CHSE Biology Heredity And Variation (Genetics) Important Short Notes For 2021 Board Exam

Unit – Genetics and Evolution

Chapter – Heredity and Variation

1. Hybridization

2. Monohybrid cross

3. Dihybrid cross

4. Principle of dominance

5. Principle of independent assortment

6. Principle of segregation

7. Back cross and test cross

8. Incomplete dominance / explain incomplete dominance through checkerboard method / give an example of incomplete dominance

9. Co-dominance

10. Multiple alleles

11. Inheritance of blood groups

12. Pleiotropy

13. Polygenic inheritance

14. Qualitative inheritance

15. Quantitative inheritance

16. Chromosomal basis of inheritance

17. Chromosome and genes / function of genes

18. Linkage

19. Crossing – over

20. Genotype and phenotype

21. Recombination

22. Homozygous and heterozygous

23. Dominant and recessive genes

24. What are the seven pairs of contrasting characters taken by Mendel for his experiment? Why he chooses pea plants for his experiment?

25. Short notes on alleles / main features of alleles

26. What do you understand by pure line or true breeding?

27. Explain the law of dominance by monohybrid cross.

28. What is point mutation? Give one example.

29. Genotype of A, B, AB and O blood groups.

30. If allele for tallness (TT) is dominant and dwarfness (tt) is recessive, then a cross between ______, 50% of the offspring will be dwarf.

1. TT x tt

2. Tt x tt

3. tt x tt

4. Tt x Tt

    31. Numerical / problems like question number 30.