Q. No.Which of the following pairs is wrongly matched?
1. Starch synthesis in pea: Multiple alleles
2. ABO blood grouping: Co-dominance
3. XO type sex determination: Grasshopper
4. T.H Morgan: Linkage
A disease caused by an autosomal primary non-disjunction is:
1. Klinefelter's Syndrome
2. Turner's Syndrome
3. Sickle Cell Anemia
4. Down's Syndrome
A true-breeding plant is:
| 1. | one that is able to breed on its own |
| 2. | produced due to cross-pollination among unrelated plants |
| 3. | near homozygous and produces offspring of its own kind |
| 4. | always homozygous recessive in its genetic constitution |
Among the following characters, which one was not considered by Mendel in his experiments on pea?
1. Trichomes-Gladular or non-gladular
2. Seed-green or yellow
3. Pod-inflated or constricted
4. Stem-Tall or Dwarf
Which of the following characteristics represent the 'Inheritance of blood groups' in humans?
a. Dominance
b. Co-dominance
c. Multiple allelism
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 |
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by:
| 1. | Only daughters | 2. | Only sons |
| 3. | Only grandchildren | 4. | Both sons and daughters |
If a colourblind man marries a woman who is homozygous for normal colour vision, the probability of their son being colourblind is:
1. 0
2. 0.5
3. 0. 75
4. 1
Which one from those given below is the period for Mendel's hybridization experiments?
| 1. | 1840-1850 | 2. | 1857-1869 |
| 3. | 1870-1877 | 4. | 1856-1863 |
2. 3:1 :: Tall : Dwarf
3. 3:1:: Dwarf : Tall
4. 1:2:1:: Tall homozygous : Tall heterozygous : Dwarf
| I: | Haemophilia is a sex-linked recessive disease. |
| II: | Down’s syndrome is due to aneuploidy. |
| III: | Phenylketonuria is an autosomal recessive gene disorder. |
| IV: | Sickle cell anaemia is an X-linked recessive gene disorder |
2. I, III and IV are correct
3. I, II and III are correct
4. I and IV are correct
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