CBSE Class 12 Biology Principles of Inheritance and Variation Question Bank

CBSE Class 12 Biology Principles of Inheritance and Variation Question Bank. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations.  Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

PRINCIPLES OF INHERITANCE AND VARIATION

1. State the difference between a gene and an allele.

2. Write the possible genotypes Mendel got when he crossed F1 Tall pea plants with a dwarf pea plant.

3. Who had proposed the chromosomal theory of inheritance?

4. Write the scientific name of the organism which T.H. Morgan used in his genetic experiments.

5. List the advantages of selecting pea plant for his experiments by Mendel

6. Briefly mention the contributions of T.H.Morgan in genetics

7. What is a point mutation, give an example

8. What is pedigree analysis, how is it useful?

9. The male fruit fly and female fowl are heterogametic, while the female fruit fly and the Male fowl are homogametic why are they termed so.

10. Define and explain test cross

11. Explain law of dominance with an example.

12. With the help of an example differentiate between incomplete dominance and co- dominance.

13. Explain the mechanism of sex determination in honeybees

14. How does the Mandelian disorder phenylketonuria occur?

15. Why did Mendel select garden pea plant for his experiments?

16. Tabulate the different types of sex determination in organisms.

17. Give the characteristic features of Turner’s Syndrome.

18. What will be the genotype and phenotype of the offspring if a colour blind man marries a carrier woman?

19. Anita was happy when she gave birth to her first child. Her in- laws were dissatisfied at her not giving birthto a male child and blamed Anita. Anita tried to convince her in laws that she had no role in the child’s gender. They understood the biological reason but were yet to be satisfied.Anita’s husband took up the matter and convinced the parents.

a) What values did Anita’s husband show in the above situation?

b) What governs sex determination in humans? How is it different from birds?

c) Why can’t Anita be blamed for not giving birth to a male child?

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