$ `X X^(C)` represents the genotype of a human femanle which acts as carrier of genes for colour blindness. ! Any change in the structure of a chromos

$ `X X^(C)` represents the genotype of a human femanle which acts as carrier of genes for colour blindness. ! Any change in the structure of a chromos
by

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Answer :

$ `X X^(C)` represents the genotype of a human femanle which acts as carrier of genes for colour blindness ... is wrong D. If both As and R are wrong.
by

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A woman with two genes for haemophilia and one gene for colour blindness on one of the ‘X’ chromosomes marries a normal man. How will the progeny be? (a) 50% haemophilic colour-blind sons and 50% normal sons. (b) 50% haemophilic daughters (carrier) and 50% colour blind daughters (carrier). (c) All sons and daughters haemophilic and colour- blind. (d) Haemophilic and colour-blind daughters.

Description : A woman with two genes for haemophilia and one gene for colour blindness on one of the X' chromosomes marries a normal man. How will the progeny be? (a) 50% haemophilic colour-blind sons ... ). (c) All sons and daughters haemophilic and colour- blind. (d) Haemophilic and colour-blind daughters.

Last Answer : (b) 50% haemophilic daughters (carrier) and 50% colour blind daughters (carrier).

In human beings, multiple genes are involved in the inheritance of (a) sickle-cell anaemia (b) skin colour (c) colour blindness (d) phenylketonuria.

Description : In human beings, multiple genes are involved in the inheritance of (a) sickle-cell anaemia (b) skin colour (c) colour blindness (d) phenylketonuria.

Last Answer : ) skin colour

In Antirrhinum two plants with pink flowers were hybridized. The F1 plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridisation? Red flower colour is determined by RR and white by rr genes. (a) rrrr (b) RR (c) Rr (d) rr

Description : In Antirrhinum two plants with pink flowers were hybridized. The F1 plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for ... is determined by RR and white by rr genes. (a) rrrr (b) RR (c) Rr (d) rr

Last Answer : (c) Rr

The colour blindness is more likely to occur in males than in females because (a) the Y-chromosome of males have the genes for distinguishing colours (b) genes for characters are located on the sex- chromosomes (c) the trait is dominant in males and recessive in females (d) none of these.

Description : The colour blindness is more likely to occur in males than in females because (a) the Y-chromosome of males have the genes for distinguishing colours (b) genes for characters are located on the sex- chromosomes (c) the trait is dominant in males and recessive in females (d) none of these.

Last Answer : (b) genes for characters are located on the sex- chromosomes

$ Male anopheles acts as the carrier host for malarial parasite ! Sleeping Sickness is caused by Leishmonia.

Description : $ Male anopheles acts as the carrier host for malarial parasite ! Sleeping Sickness is caused by Leishmonia.

Last Answer : $ Male anopheles acts as the carrier host for malarial parasite ! Sleeping Sickness is caused by Leishmonia. ... wrong D. If both As and R are wrong.

A polygenic inheritance in human beings is (a) skin colour (b) phenylketonuria (c) colour blindness (d) sickle cell anaemia

Description : A polygenic inheritance in human beings is (a) skin colour (b) phenylketonuria (c) colour blindness (d) sickle cell anaemia

Last Answer : (a) skin colour

Introduction of foreign genes for improving genotype is Or Insertion or deletion of one or more new genes which are absent in an organism by artificia

Description : Introduction of foreign genes for improving genotype is Or Insertion or deletion of one or more new genes which are absent in an organism by artificia

Last Answer : Introduction of foreign genes for improving genotype is Or Insertion or deletion of one or more ... . vernalization C. genetic engineering D. eugenics

Polygenic genes show: (a) Different phenotype (b) Different genotype (c) Similar phenotype (d) Similar genotype

Description : Polygenic genes show: (a) Different phenotype (b) Different genotype (c) Similar phenotype (d) Similar genotype

Last Answer : Ans. ((a))

The sum of genes in a population is called – (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Description : The sum of genes in a population is called – (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Last Answer : (4) Gene pool Explanation: Phenotype refers to a set of observable characteristics of an individual or group resulting from the interaction of its genotype with its environment. Gene pool refers to the stock of different genes in an interbreeding population.

When scientists make an animal superior by view of genotype, introducing some foreign genes in it, is called (a) immunization (b) genetic engineering (c) tissue culture (d) biotechnology.

Description : When scientists make an animal superior by view of genotype, introducing some foreign genes in it, is called (a) immunization (b) genetic engineering (c) tissue culture (d) biotechnology.

Last Answer : (b) genetic engineering

A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab? (a) AAbb and aabb (b) AaBb and aabb (c) AABB and aabb (d) None of these

Description : A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab? (a) AAbb and aabb (b) AaBb and aabb (c) AABB and aabb (d) None of these

Last Answer : (b) AaBb and aabb

What is the introduction of foreign genes for improving genotype?

Description : What is the introduction of foreign genes for improving genotype?

Last Answer : Immunisation

The sum of genes in a population is called (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Description : The sum of genes in a population is called (1) Phenotype (2) Karyotype (3) Genotype (4) Gene pool

Last Answer : Gene pool

$ Night blindness is due to deficiency of vitamin "A" ! Actually the term vitamin means vital minerals.

Description : $ Night blindness is due to deficiency of vitamin "A" ! Actually the term vitamin means vital minerals.

Last Answer : $ Night blindness is due to deficiency of vitamin "A" ! Actually the term vitamin means vital minerals. A. ... is wrong D. If both As and R are wrong.

$ Those genes which are present on "Y" chromosomes of human beings are called holandric genes. ! Holandric genes are present both in men as well as wo

Description : $ Those genes which are present on "Y" chromosomes of human beings are called holandric genes. ! Holandric genes are present both in men as well as wo

Last Answer : $ Those genes which are present on "Y" chromosomes of human beings are called holandric genes. ! Holandric ... wrong D. If both As and R are wrong.

.Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? (a) Erythroblastosis fetalis - X-linked (b) Down’s syndrome - 44 autosomes + XO (c) Klinefelter’s syndrome - 44 autosomes + XXY (d) Colour blindness - Y-linked

Description : .Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? (a) Erythroblastosis fetalis - X-linked (b) Down’s syndrome - 44 autosomes + XO (c) Klinefelter’s syndrome - 44 autosomes + XXY (d) Colour blindness - Y-linked

Last Answer : (c) Klinefelter’s syndrome - 44 autosomes + XXY

In fruit flies the allele for red eyes R is dominant which genotype represents a white-eyed male fruit fly?

Description : In fruit flies the allele for red eyes R is dominant which genotype represents a white-eyed male fruit fly?

Last Answer : X"Y . I hate novanet .

In fruit flies the allele for red eyes r is dominant which genotype represents a white eyed male fruit fly?

Description : In fruit flies the allele for red eyes r is dominant which genotype represents a white eyed male fruit fly?

Last Answer : X"Y . I hate novanet .

$ Human population can be controlled with the help of certain devices such as condoms, copper T and diaphragm. ! All the above devices acts as barrier

Description : $ Human population can be controlled with the help of certain devices such as condoms, copper T and diaphragm. ! All the above devices acts as barrier

Last Answer : $ Human population can be controlled with the help of certain devices such as condoms, copper T and diaphragm ... wrong D. If both As and R are wrong.

Is colour blindness a good thing?

Description : Is colour blindness a good thing?

Last Answer : My husband and my father are both color blind, and I always find myself frustrated with their inability to make out the same colors that I can. Trying to choose paint for the walls or any comparable task becomes ... eyes. However, if it works for you and you can see the positive, I say run with it.

Which of the following tests is used for the diagnosis of ‘Colour-Blindness’ in people?

Description : Which of the following tests is used for the diagnosis of ‘Colour-Blindness’ in people?

Last Answer : Ishihara Test

Which cell disorder in our body is responsible for colour blindness? (1) WBC (2) Cone cell (3) Red Cell (4) Neuron

Description : Which cell disorder in our body is responsible for colour blindness? (1) WBC (2) Cone cell (3) Red Cell (4) Neuron

Last Answer : (2) Cone cell Explanation: Colour vision deficiency, commonly called colour blindness, results from a malfunction or absence of cone cells in the retina. Cone cellsare one of three types of ... of the human eye that is responsible for colour vision and function best in relatively bright lights.

A man with colour blindness will see red as - (1) Yellow (2) Blue (3) Green (4) Violet

Description : A man with colour blindness will see red as - (1) Yellow (2) Blue (3) Green (4) Violet

Last Answer : (3) Green Explanation: Colour-blindness is the inability to distinguish the differences between certain colours. This condition results from an absence of colour-sensitive pigment in the cone cells of the ... type is red-green colour-blindness, where red and green are seen as the same color.

Colour blindness is more common in men than women.

Description : Colour blindness is more common in men than women.

Last Answer : Ans: Women have the sex chromosomes XX, while men have the chromosomes XY. The gene for normal colour vision is found on the X-chromosome. If a woman has one Xchromosome with the gene ... colour vision gene. This is less probable mathematically than having just one X-chromosome missing the gene.

Give scientific reason of the following : a) Colour blindness is more common in men than in women b) Light coloured clothes are generally worn in summer c) A person is hurt more when he falls on hard ground than on soft d) Deforestation causes more floods e) The man-hole covers are generally round

Description : Give scientific reason of the following : a) Colour blindness is more common in men than in women b) Light coloured clothes are generally worn in summer c) A person is hurt more when he falls ... ground than on soft d) Deforestation causes more floods e) The man-hole covers are generally round

Last Answer : a) Colour blindness is more common in men than in women Women have the sex chromosomes XX, while men have the chromosomes XY. The gene for normal colour vision is found on the X- ... of flowing water. When these trees are cut the natural barriers ultimately vanish and more floods are caused

The visual acuity is affected by: a. pupil size b. illumination of the target c. red-green colour blindness d. contrast

Description : The visual acuity is affected by: a. pupil size b. illumination of the target c. red-green colour blindness d. contrast

Last Answer : contrast

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character. (a) The female parent is heterozygous. (b) The parents could not have had a normal daughter for this character. (c) The trait under study could not be colour blindness. (d) The male parent is homozygous dominant.

Description : Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character. (a) The female parent is heterozygous. (b) The parents could not ... The trait under study could not be colour blindness. (d) The male parent is homozygous dominant.

Last Answer : (a) The female parent is heterozygous.

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ? (a) Nil (b) 0.25 (c) 0.5 (d) 1

Description : A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ? (a) Nil (b) 0.25 (c) 0.5 (d) 1

Last Answer : b) 0.25

Which of the following is an example of pleiotropy? (a) Haemophilia (b) Thalassemia (c) Sickle cell anaemia (d) Colour blindness

Description : Which of the following is an example of pleiotropy? (a) Haemophilia (b) Thalassemia (c) Sickle cell anaemia (d) Colour blindness

Last Answer : (c) Sickle cell anaemia

Multiple alleles control inheritance of (a) phenylketonuria (b) colour blindness (c) sickle cell anaemia (d) blood groups.

Description : Multiple alleles control inheritance of (a) phenylketonuria (b) colour blindness (c) sickle cell anaemia (d) blood groups.

Last Answer : (d) blood groups.

Which cell disorder in our body is responsible for colour blindness? (1) WBC (2) Cone cell (3) Red Cell (4) Neuron

Description : Which cell disorder in our body is responsible for colour blindness? (1) WBC (2) Cone cell (3) Red Cell (4) Neuron

Last Answer : Cone cell

A man with colour blindness will see red as (1) Yellow (2) Blue (3) Green (4) Violet

Description : A man with colour blindness will see red as (1) Yellow (2) Blue (3) Green (4) Violet

Last Answer : Green

$ Incomplete dominance is due to geneninteraction. ! Complementray genes give the ratio 9:7

Description : $ Incomplete dominance is due to geneninteraction. ! Complementray genes give the ratio 9:7

Last Answer : $ Incomplete dominance is due to geneninteraction. ! Complementray genes give the ratio 9:7 A. If both As ... wrong D. If both As and R are wrong.

$ Those two pairs of genes which if present in dominant stage, do not produce any expression but when present collectively in dominant stage, produce

Description : $ Those two pairs of genes which if present in dominant stage, do not produce any expression but when present collectively in dominant stage, produce

Last Answer : $ Those two pairs of genes which if present in dominant stage, do not produce any expression but when ... wrong D. If both As and R are wrong.

Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein (a) binds with epithelial cells of midgut of the insect pest ultimately killing it (b) is coded by several genes including the gene cry (c) is activated by acid pH of the foregut of the insect pest (d) does not kill the carrier bacterium which is itself resistant to this toxin.

Description : Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein (a) binds with epithelial cells of midgut of the insect pest ultimately killing it (b) is coded by several ... pest (d) does not kill the carrier bacterium which is itself resistant to this toxin.

Last Answer : (a) binds with epithelial cells of midgut of the insect pest ultimately killing it

Which of the following events occurred first? (1) DNA structure of genes was discovered by James D Watson and Francis Crick (2) Yuri Gagarin became the first man in space (3) World's first human heart transplant was performed by Dr. Christian Barnard (4) World's first test tube baby Louise Brown was born in U.K.

Description : Which of the following events occurred first? (1) DNA structure of genes was discovered by James D Watson and Francis Crick (2) Yuri Gagarin became the first man in space (3) World's first human heart ... by Dr. Christian Barnard (4) World's first test tube baby Louise Brown was born in U.K.

Last Answer : (1) DNA structure of genes was discovered by James D Watson and Francis Crick Explanation: Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: ... human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.

Which of the following events occurred first ? (1) DNA structure of genes was discovered by James D Watson and Francis Crick (2) Yuri Gagarin became the first man in space (3) World’s first human heart transplant was performed by Dr. Christian Barnard (4) World’s first test tube baby Louise Brown was born in U.K

Description : Which of the following events occurred first ? (1) DNA structure of genes was discovered by James D Watson and Francis Crick (2) Yuri Gagarin became the first man in space (3) World's first human heart ... by Dr. Christian Barnard (4) World's first test tube baby Louise Brown was born in U.K

Last Answer :  DNA structure of genes was discovered by James D Watson and Francis Crick

Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Description : Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Last Answer : (3) number of chromosomes Explanation: An organism having more than two sets of homologous chromosomes is known as polyploid and the phenomenon polyploidy. Polyploidy refers to a numerical change in ... due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.

Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Description : Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Last Answer : number of chromosomes

$ Silver fish is found in the sea. ! Fish represents warm blooded animals.

Description : $ Silver fish is found in the sea. ! Fish represents warm blooded animals.

Last Answer : $ Silver fish is found in the sea. ! Fish represents warm blooded animals. A. If both As and R are ... R is wrong D. If both As and R are wrong.

Why Deinococcusradiodurans is able to survive massive exposure to radiation? A- .Because it produces a thick shell which acts as a shield from the radiation B- Because it has unique DNA repair mechanisms C- Because its cellwall contains radioactive elements D- Because it has many copies of genes encoding DNA repair

Description : Why Deinococcusradiodurans is able to survive massive exposure to radiation? A- .Because it produces a thick shell which acts as a shield from the radiation B- Because it has unique DNA repair ... its cellwall contains radioactive elements D- Because it has many copies of genes encoding DNA repair

Last Answer : Because it has many copies of genes encoding DNA repair

Choose the correct statement(s) about pioglitazone: A. It acts as an agonist on nuclear paroxisome proliferator receptor γ B. It enhances transcription of insulin responsive genes C. It lowers blood sugar in type 2 diabetes mellitus without causing hyperinsulinemia D. All of the above

Description : Choose the correct statement(s) about pioglitazone: A. It acts as an agonist on nuclear paroxisome proliferator receptor γ B. It enhances transcription of insulin responsive genes C. It lowers blood sugar in type 2 diabetes mellitus without causing hyperinsulinemia D. All of the above

Last Answer : D. All of the above

What satellite system parameter represents the quality of a satellite or an earth station receiver? A. Gain-to-Equivalent Noise Temperature Ratio (G/Te) B. Energy of Bit-to-Noise Density Ratio (Eb/No) C. Carrier-to-Noise Density Ratio (C/No) D. Bit energy

Description : What satellite system parameter represents the quality of a satellite or an earth station receiver? A. Gain-to-Equivalent Noise Temperature Ratio (G/Te) B. Energy of Bit-to-Noise Density Ratio (Eb/No) C. Carrier-to-Noise Density Ratio (C/No) D. Bit energy

Last Answer : A. Gain-to-Equivalent Noise Temperature Ratio (G/Te)

$ Leghaemoglobin is a compound of Iron and is present in the root nodules of leguminous plants. ! It acts as an oxygen scavenger and forms a temporary

Description : $ Leghaemoglobin is a compound of Iron and is present in the root nodules of leguminous plants. ! It acts as an oxygen scavenger and forms a temporary

Last Answer : $ Leghaemoglobin is a compound of Iron and is present in the root nodules of leguminous plants. ! It acts ... is wrong D. If both As and R are wrong.

$ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of the 109 known elements.

Description : $ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of the 109 known elements.

Last Answer : $ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of ... wrong D. If both As and R are wrong.

$ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum of a prokaryotic cell is formed of a protein called Tubulin.

Description : $ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum of a prokaryotic cell is formed of a protein called Tubulin.

Last Answer : $ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum of a prokaryotic cell is formed of a ... wrong D. If both As and R are wrong.

Which of the following acts as electron carrier in both photosynthesis and respirtion ?

Description : Which of the following acts as electron carrier in both photosynthesis and respirtion ?

Last Answer : Which of the following acts as electron carrier in both photosynthesis and respirtion ? A. Ferredoxin B. Phytochrome C. Cytochrome D. Cryptochrome

The gut controls the entry of ingested iron in the body by: A. Regulating the availability of apoferritin which acts as the carrier of iron across the mucosal cell B. Regulating the turnover of apoferritin-ferritin interconversion in the mucosal cell C. Complexing excess iron to form ferritin which remains stored in the mucosal cell and is shed off D. Regulating the number of transferrin receptors on the mucosal cell

Description : The gut controls the entry of ingested iron in the body by: A. Regulating the availability of apoferritin which acts as the carrier of iron across the mucosal cell B. Regulating the turnover of ... mucosal cell and is shed off D. Regulating the number of transferrin receptors on the mucosal cell

Last Answer : C. Complexing excess iron to form ferritin which remains stored in the mucosal cell and is shed off

Fruit colour in squash is an example of (a) recessive epistasis (b) dominant epistasis (c) complementary genes (d) inhibitory genes.

Description : Fruit colour in squash is an example of (a) recessive epistasis (b) dominant epistasis (c) complementary genes (d) inhibitory genes.

Last Answer : (a) recessive epistasis

$ Inharitance of flower colour in mirabilis jalapa is type of polygenic inheritance. ! Polysomes are a type of chromosomes.

Description : $ Inharitance of flower colour in mirabilis jalapa is type of polygenic inheritance. ! Polysomes are a type of chromosomes.

Last Answer : $ Inharitance of flower colour in mirabilis jalapa is type of polygenic inheritance. ! Polysomes are a type ... wrong D. If both As and R are wrong.