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 : 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 : A polygenic inheritance in human beings is (a) skin colour (b) phenylketonuria (c) colour blindness (d) sickle cell anaemia
Last Answer : (a) skin colour
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 : 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 : 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 : 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 : 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 : 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 : 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 : $ 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 : 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).
Description : Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement : (1) Both are due to a quantitative defect in globin chain synthesis (2 ... problem of globin molecules (4) Both are due to a qualitative defect in globin chain synthesis
Last Answer : (2) Thalassemia is due to less synthesis of globin molecules
Description : Recombinant human erythropoietin is indicated for: A. Megaloblastic anaemia B. Haemolytic anaemia C. Anaemia in patients of thalassemia D. Anaemia in chronic renal failure patients
Last Answer : D. Anaemia in chronic renal failure patients
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 : 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 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 : 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 of the following is a hereditary disease? (1) Haemophilia (2) Myopia (3) Anaemia (4) Leukemia
Last Answer : (1) Haemophilia Explanation: Hemophilia is a group of hereditary genetic disorders that impair the body's ability to control blood clotting or coagulation, which is used to stop bleeding when a ... been associated with royal families due to inbreeding, and is sometimes called the 'Royal Disease.'
Description : Which one of the following is a condition of delayed blood clotting? (1) Heaemorrhage (2) Hematuria (3) Haemophilia (4) Anaemia
Last Answer : (3) Haemophilia Explanation: Haemophilia is a group of hereditary genetic disorders that impair the body's ability to control blood clotting or coagulation, which is used to stop bleeding when a blood vessel is broken.
Last Answer : Haemophilia
Description : Which one of the following is a hereditary disease ? (1) Haemophilia (2) Myopia (3) Anaemia (4) Leukemia
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 : 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 : 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 : Thalassemia is an example of – (1) Deletion mutation (2) Point mutation (3) Silent mutation (4) Frame shift mutation
Last Answer : (4) Frame shift mutation Explanation: Frame shift mutations are associated with Thalassemia. They involve a deletion or insertion of one' or two base pairs within a coding sequence of a gene. As ... and deletions, the reading frame of mRNA is altered resulting in a nonsense sequence of amino acids.
Description : Thalassemia is an example of (1) Deletion mutation (2) Point mutation (3) Silent mutation (4) Frame shift mutation
Last Answer : Frame shift mutation
Description : Which of the statements give below is correct with respect to frameshift mutation a) a single nucleotide base change, insertion, or deletion of the genetic material b) Glutamine is replaced by valine c) ... or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.
Last Answer : d) insertions or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.
Description : Ability of a gene to express more than one characters is called Pleiotropy. ! The occurance of a bacterium in more than one morphological forms is cal
Last Answer : Ability of a gene to express more than one characters is called Pleiotropy. ! The occurance of a bacterium ... wrong D. If both As and R are wrong.
Description : When a single gene influences more than one trait it is called (a) pseudodominance (b) pleiotropy (c) epistasis (d) none of these.
Last Answer : (b) pleiotropy
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 : 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 : $ `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 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
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
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
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.