Reproduction in Organisms Class 12 MCQs Questions with Answers

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

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

3. The distance between the genes is measured by

4. Genetical identification of male human is

5.  Genotype of hybrid is determined by___________

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

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

8. A test cross is carried out to__________

9. First geneticist/father of genetics was:

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

11. Trisomy is represented by

12. All genes located on the same chromosome

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

14. 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

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

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

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

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

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

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