Reproduction in Organisms Class 12 MCQs Questions with Answers

1. All genes located on the same chromosome

2. A test cross is carried out to__________

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

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

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

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

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

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

9. First geneticist/father of genetics was:

10. Trisomy is represented by

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

12.  Genotype of hybrid is determined by___________

13. The distance between the genes is measured by

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

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

16. Genetical identification of male human is

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

18. 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

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

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