Q20 of 167 Page 192

Name an animal in which individuals can change sex. What does this indicate?

(B) Snail can change sex amongst its individuals. It is usually done among the endangered snail species in order to keep themselves Alive. This indicates that genes do not play a role in determining the sex of the individual.


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19

A man having blood group 0 marries a woman having blood group B and they have a daughter. What will be the blood group of the daughter?

 20

Name the scientist who gave the laws of inheritance.

 21

Explain with an example, how genes control the characteristics (or traits).

 22

State one advantage of variation to a species.