Question

(a) What is meant by 'heredity' ? What are the units of heredity.

(b) State Mendel's first law of inheritance.

Answer 1

(a) The transmission of characters from parents to the offspring’s is called heredity. The units of heredity are genes.
(b) According to Mendel’s first law of inheritance: The characteristics (or traits) of an organism are determined by internal ‘factors’ which occur in pairs. Only one of a pair of such factors can be present in a single gamete