CUET Biology Mock Test Unit II Genetics and Evolution Set B

1. A pleiotropic gene

2. ABO blood group system is due to

3. Sex is determined in human beings

4. If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is

5. If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

6. Which of the following will not result in variations among siblings?

7. A normal green male maize is crossed with albino female. The progeny is albino because

8. The contrasting pairs of factors in Mendelian crosses are called

9. In a cross between AABB × aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be

10. Mendel studied interitance of seven pairs of traits in pea which can have 21 possible combinations. If you are told that in one of these combinations, independent assortment is not observed in later studies, your reaction will be

11. A fruit fly exhibiting both male and female traits is

12. Alleles that produce independent effects in their heterozygous condition are called

13. Hybridization between Tt × tt gives rise to the progeny of ratio

14. Extranuclear inheritance occurs in

15. The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes?

16. In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of

17. The number of phenotypes in ABO blood groups is

18. Mendel’s Law of independent assortment holds good for genes situated on the:

19. _________ is a type of trait whose phenotype is influenced by more than one gene

20. In humans, the dominance relationship between the A and B alleles of the ABO blood group gene is an example of