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Earn 100
Mark the correct statement (w.r.t. sickle cell anaemia)
50% studentsanswered this correctly
Important Questions on Principles of Inheritance and Variation
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The defect sickle-cell anaemia is caused by the -------of glutamic acid by valine at the position of the --------globin chain of the haemoglobin molecule.
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A holandric gene is known for hypertrichosis (long hairs on ears). When a man with hairy ears marries a normal woman, what percentage of their daughters would be expected to have hairy ears?
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A normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?
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Mr Stevan is suffering from haemophilia and cystic fibrosis. His father is heterozygous for cystic fibrosis. The probability of Stevan's sperm having recessive X-linked as well as autosomal alleles is
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Select incorrect one (w.r.t. reciprocal cross)
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In Lathyrus odoratus, hybrid blue flowered and long pollen plant is test crossed with homozygous recessive red flowered and round pollen plant then how many parental types are obtained when genes are present in cis stage in parents?
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Match the following - (w.r.t. Pedigree analysis)
| Column-I | Column-II |
| a. Solid symbol | (i) Carrier of sex linked trait |
| b. Horizontal line between symbols | (ii) Offspring |
| c. Horizontal line above the symbols | (iii) Trait to be studied |
| d. Dot in centre | (iv) Parents |
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Select incorrect statements
(A) Linked genes cause absolute lethality.
(B) Persons affected by PKU do not show mental disorder.
(C) ratio in codominance and incomplete dominance are same.
(D) Sex of male Drosophila is dependent on Y-chromosome.
