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
Description : Multiple alleles control inheritance of (a) phenylketonuria (b) colour blindness (c) sickle cell anaemia (d) blood groups.
Last Answer : (d) blood groups.
Description : .Represented here is the inheritance pattern of a certain type of trait in humans. Which one of the following conditions could be an example of this pattern? (a) Phenylketonuria (b) Sickle cell anaemia (c) Haemophilia (d) Thalassemia
Last Answer : (c) Haemophilia
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
Description : Pick out the correct statements. (1) Haemophilia is a sex-linked recessive disease. (2) Down's syndrome is due to aneuploidy. (3) Phenylketonuria is an autosomal recessive gene disorder. (4) Sickle cell anaemia is an X- ... are correct. (c) (1) and (4) are correct. (d) (2) and (4) are correct.
Last Answer : (b) (1), (2) and (3) are correct.
Description : Select the correct match. (a) Haemophilia – Y linked (b) Phenylketonuria – Autosomal dominant trait (c) Sickle cell anaemia – Autosomal recessive trait,chromosome -11 (d) Thalassemia – X linked
Last Answer : (c) Sickle cell anaemia – Autosomal recessive trait,chromosome -11
Description : The most striking example of point mutation is found in a disease called (a) Down’s syndrome (b) sickle cell anaemia (c) thalassaemia (d) night blindness.
Last Answer : (b) sickle cell anaemia
Description : . Which one of the following is an example of polygenic inheritance? (a) Skin colour in humans (b) Flower colour in Mirabilis jalapa (c) Production of male honeybee (d) Pod shape in garden pea
Last Answer : (a) Skin colour in humans
Description : Inheritance of skin colour in humans is an example of (a) point mutation (b) polygenic inheritance (c) codominance (d) chromosomal aberration.
Last Answer : (b) polygenic inheritance
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.
Description : Consider the following human diseases: 1. Anaemia 2. Haemophilia 3. Leukemia 4. Phenylketonuria Which of the above diseases are hereditary in nature? (a) 1, 2 and 3 (b) 1 and 4 (c) 2 and 3 (d) 2 and 4
Last Answer : Ans:(d)
Description : Which one is a hereditary disease? (a) Cataract (b) Leprosy (c) Blindness (d) Phenylketonuria
Last Answer : (d) Phenylketonuria
Description : Abnormal chain of amino acids in sickle cell anaemia is (A) Alpha chain (B) Beta chain (C) Delta chain (D) Gama chain
Last Answer : Answer : B
Description : Blood cancer is commonly known as – (1) Leucoderma (2) Leukaemia (3) Haemophilia (4) Sickle-cell. anaemia
Last Answer : (2) Leukaemia Explanation: Leukemia is a cancer of blood and bone marrow. When a person has leukemia, the body makes too many white blood cells (leukocytes). The causes of most types of leukemia are not known. In general, all cancers have a breakdown in the normal way cell division is controlled.
Description : The oxygen dissociation curve is shifted to the right with: a. polycythaemia b. pyrexia c. respiratory acidosis d. sickle cell anaemia
Last Answer : pyrexia
Description : Sickle cell anaemia induce to (a) change of amino acid in a-chain of haemoglobin (b) change of amino acid in b-chain of haemoglobin (c) change of amino acid in both a and b chains of haemoglobin (d) change of amino acid either a or b chains of haemoglobin.
Last Answer : (b) change of amino acid in b-chain of haemoglobin
Description : Which of the following is a correct match? (a) Down’s syndrome - 21st chromosome (b) Sickle cell anaemia - X-chromosome (c) Haemophilia - Y-chromosome (d) Parkinson’s disease - X and Y chromosome
Last Answer : a) Down’s syndrome - 21st chromosome
Description : .Which one of the following conditions though harmful in itself, is also potential saviour from a mosquito borne infectious disease ? (a) Thalassaemia (b) Sickle cell anaemia (c) Pernicious anaemia (d) Leukaemia
Last Answer : (b) Sickle cell anaemia
Description : Sickle cell anaemia has not been eliminated from the African population because (a) it is controlled by dominant genes (b) it is controlled by recessive genes (c) it is not a fatal disease (d) it provides immunity against malaria
Last Answer : (d) it provides immunity against malaria.
Description : Both sickle cell anaemia and Huntington’s chorea are (a) virus-related diseases (b) bacteria-related diseases (c) congenital disorders (d) pollutant-induced disorders.
Last Answer : c) congenital disorders
Description : . Sickle-cell anaemia is (a) caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin (b) caused by a change in a single base pair of DNA (c) characterized by elongated sickle like RBCs with a nucleus (d) an autosomal linked dominant trait.
Last Answer : (b) caused by a change in a single base pair of DNA
Description : .A disease caused by an autosomal primary non- disjunction is (a) Klinefelter’s syndrome (b) Turner’s syndrome (c) Sickle cell anaemia (d) Down’s syndrome.
Last Answer : (d) Down’s syndrome.
Description : Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement. (a) Both are due to a quantitative defect in globin chain synthesis. (b ... problem of globin molecules. (d) Both are due to a qualitative defect in globin chain synthesis.
Last Answer : (b) Thalassemia is due to less synthesis of globin molecules
Description : Which one of the following statements is correct regarding sexually transmitted diseases (STDs)? (a) A person may contract syphilis by sharing milk with one already suffering from the disease. (b) Haemophilia is ... both STDs. (d) The chances of a 5-years boy contracting a STD are very little.
Last Answer : (d) The chances of a 5-years boy contracting a STD are very little.
Description : In polygenic inheritance phenotypic characters are determined by -Biology
Last Answer : answer:
Description : What is Polygenic Inheritance ?
Last Answer : : Polygenic inheritance refers to the phenotypic traits found in a single inheritance formula that are controlled by two or more genes.
Description : Which one of the following pairs of features is a good example of polygenic inheritance?
Last Answer : Which one of the following pairs of features is a good example of polygenic inheritance? A. Human ... D. Human eye colour and sickle cell anaemia
Description : .Match the terms in column I with their description in column II and choose the correct option. Column I Column II A. Dominance (i) Many genes govern a single character B. Co-dominance (ii) In a heterozygous organism only one allele ... (i) (ii) (c) (ii) (i) (iv) (iii) (d) (ii) (iii) (iv) (i)
Last Answer : (d) (ii) (iii) (iv) (i)
Description : Which of the following characteristics represent ‘inheritance of blood groups’ in humans? (i) Dominance (ii) Co-dominance (iii)Multiple allele (iv) Incomplete dominance (v) Polygenic inheritance (a) (ii), (iii) and (v) (b) (i), (ii) and (iii) (c) (ii), (iv) and (v) (d) (i), (iii) and (v)
Last Answer : (b) (i), (ii) and (iii)
Description : Mendel’s last law is (a) segregation (b) dominance (c) independent assortment (d) polygenic inheritance.
Last Answer : (c) independent assortment
Description : Which of the following characteristics represent 'Inheritance of blood groups' in humans ? a. Dominance b. Co-dominance c. Multiple dominance d. Incomplete dominance e. Polygenic inheritance (1) b, c and e (2) a, b and c (3) b, d and e (4) a, c and e
Last Answer : (2) a, b and c
Description : A cross of a red cow (RR) with a white bull (WW) produces all roan offspring (RRWW). This type of inheritance is known as a. incomplete dominance. b. polygenic inheritance. c. codominance. d. multiple alleles.
Last Answer : c. codominance.
Description : Situations in which one allele for a gene is not completely dominant over another allele for that gene are called a. multiple alleles. b. incomplete dominance. c. polygenic inheritance. d. multiple genes.
Last Answer : b. incomplete dominance.
Description : How is analyzing the inheritance patterns of sickle cell disease through pedigrees allowed scientists to determine that the disease is autosomal recessive?
Last Answer : Feel Free to Answer
Description : Study the pedigree chart given below. What does it show? (a) Inheritance of a condition like phenylketonuria as an autosomal recessive trait. (b) The pedigree chart is wrong as this is ... disease like haemophilia. (d) Inheritance of a sex-linked inborn error of metabolism like phenylketonuria
Last Answer : (a) Inheritance of a condition like phenylketonuria as an autosomal recessive trait.
Description : Abnormal chain of amino acids in sickle cells anaemia is (A) Alpha chain (B) Beta chain (C) Gama chain (D) Delta chain
Description : Haemoglobin SC disease: a. is common amongst Afro-carribean people b. does not show sickle cells in the blood film. c. causes severe anaemia d. causes retinal vein occlusion
Last Answer : causes retinal vein occlusion
Description : $ Sicke cell anaemia is a type of pleiotropy. ! Sex linked inharitance is also called criss cross inheritance.
Last Answer : $ Sicke cell anaemia is a type of pleiotropy. ! Sex linked inharitance is also called criss cross inheritance ... wrong D. If both As and R are wrong.
Description : The deficiency of iron in man result in (1) Anaemia (2) Night, blindness (3) Scurvy (4) Rickets
Last Answer : (1) Anaemia Explanation: Anaemia is a condition in which the number of red blood cells or their oxygencarrying capacity is insufficient to meet physiologic needs, which vary by age, sex, altitude, ... , and pregnancy status. Iron deficiency is thought to be the most common cause of anaemia globally
Description : The deficiency of iron in man result in (1) Anaemia (2) Night blindness (3) Scurvy (4) Rickets
Last Answer : Anaemia
Description : $ `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
Last 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.
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.
Last Answer : Cone cell
Description : Consider the Assertion-I and Assertion-II and select the right code given below : Assertion-I : Even Bank-lockers are not safe. Thieves can break them and take away your wealth. But thieves cannot go ... is an argument but the assertion-I is not. (D) Both the assertions are explanations of facts.
Last Answer : (B) The assertion-I is an argument but the assertion-II is not.
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.
Description : Which of the following tests is used for the diagnosis of ‘Colour-Blindness’ in people?
Last Answer : Ishihara Test
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.
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.
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
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