Q3 of 26 Page 284

Write a note on heredity.

Heredity means continuity of features from one generation to the next. It is the tendency of every individual to express the inherited characters of its parent. Hereditary information is present in the zygote which develops into an organism of a particular type only.

Due to heredity, an egg laid by a sparrow always hatch into a sparrow. Similarly, a tigress gives birth to cubs only.


More from this chapter

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3

Does geographical isolation of individuals of a species lead to the formation of a new species? Provide a suitable explanation for your answer.

 3

How characters are inherited?

 4

(a) Explain the terms ‘analogous organs’ and ‘homologous organs’ with examples.

(b) In what way analogous organs give evolution?

 4

(a) Define ‘speciation’. Explain how speciation occurs.

(b) Will geographical isolation be major factor in the speciation of a self-pollinating plant species? Give reason for your answer.