Reproduction in Organisms Class 12 MCQs Questions with Answers

1.  Genotype of hybrid is determined by___________

2. Where are the genes for cytoplasmic male sterility in plants located?

3. Experimental verification of ‘chromosomal theory of inheritance’ was done by

4. Among the following characters, which one was not considered by Mendel in his experiments of
pea__________

5. This abnormality occurs due to monosomy (2n – 1); the individual has 2n = 45 chromosomes with 44 + XO genotype.

6. First geneticist/father of genetics was:

7. The distance between the genes is measured by

8. Trisomy is represented by

9. Which Mendelian idea is depicted by a cross in which F1 generation resembles both the parents_________

10. Genetical identification of male human is

11. In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine ?

12. All genes located on the same chromosome

13. A test cross is carried out to__________

14. A trait that “overpowers” and hide another trait is called

15. Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent ?

16. ZZ/ZW type of sex determination is seen in

17. Which of the following are reasons for Mendel’s success ?
(i) Usage of pure lines or pure breeding varieties
(ii) Consideration of one character at a time
(iii) Maintenance of statistical records of experiments
(iv) Knowledge of linkage and incomplete dominance

18. If both parent are carriers for thalassemia, which is an autosomal recessive disorders, what are the chances of pregnancy resulting in an affected child?

19. Human blood grouping is called ABO instead of ABC because O signifies_______

20. Select the disease which is caused by recessive autosomal genes when present in homozygous conditions.