Q. No.Which of the following most appropriately describes haemophilia?
1. X-linked recessive gene disorder
2. Chromosomal disorder
3. Dominant gene disorder
4. Recessive gene disorder
1. X-linked recessive gene disorder
2. Chromosomal disorder
3. Dominant gene disorder
4. Recessive gene disorder
A gene showing co-dominance has?
| 1. | One allele is dominant on the other |
| 2. | Alleles are tightly linked on the same chromosome |
| 3. | Alleles that are recessive to each other |
| 4. | Both alleles are independently expressed in the heterozygote |
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree:
1. Autosomal dominant
2. X-linked recessive
3. Autosomal recessive
4. X-linked dominant
In his classic experiments on pea plants Mendel did not use?
1. Seed color
2. Pod length
3. Seed shape
4. Flower position
A pleiotropic gene:
| 1. | Is expressed only in primitive plants |
| 2. | Is a gene that evolved during Pliocene |
| 3. | Controls a trait only in combination with another gene |
| 4. | Controls multiple traits in an individual |
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
| 1. | Five | 2. | Six |
| 3. | Eight | 4. | Seven |
Alleles are:
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
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