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?
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. |