Q32 of 167 Page 192

Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:

(a) Yellow seed (b) Round seed

(a) Green seed is the contrasting trait of yellow seed where Green is recessive and yellow is dominant.

(b) Wrinkled seed is the contrasting of round seed where Wrinkled is recessive and round is dominant.


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30

Gregor Mendel's first law of genetics states "Of a pair of contrasted characters, only one can be represented in a gamete by its internal 'factor'.

(a) Give the modem name for this 'factor'.


(b) State where these factors are found in gametes.

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Does genetic combination of mother play a significant role in determining the sex of a new born baby?

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What is meant by 'heredity' ? What are the units of heredity?

 33

State Mendel's first law of inheritance.