Q. No.Alleles are:
1. different phenotype
2. true breeding homozygotes
3. different molecular forms of a gene
4. heterozygotes
1. different phenotype
2. true breeding homozygotes
3. different molecular forms of a gene
4. heterozygotes
A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offspring?
2. A, B and AB
3. A, B, AB and O
4. Only O
Fruit colour in squash is an example of:
1. Recessive epistasis
2. Dominant epistasis
3. Complementary genes
4. Inhibitory genes
| 1. | Incomplete dominance | 2. | Partial dominance |
| 3. | Complete dominance | 4. | Codominance |
| 1. | 50% | 2. | 25 % |
| 3. | 100% | 4. | no chance |
A man whose father was colour blind marries a woman who had a colour blind mother and a normal father. What percentage of male children of this couple will be colour blind?
1. 25%
2. 0%
3. 50%
4. 75%
A human female with Turner's syndrome:
1. has 45 chromosomes with XO
2. has one additional chromosome.
3. exhibit male character
4. is able to produce children with a normal husband.
Which of the following statements is not true of two genes that show 50% recombination frequency?
| 1. | The genes are tightly linked. |
| 2. | The genes show independent assortment. |
| 3. | If the genes are present on the same chromosome, they undergo more than one crossing-over in every meiosis. |
| 4. | The genes may be on different chromosomes. |
The incorrect statement with regard to Haemophilia is:
| 1. | It is a recessive disease |
| 2. | It is a dominant disease |
| 3. | A single protein involved in the clotting of blood is affected |
| 4. | it is a sex-linked disease. |
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