Question

A bisexual self pollinating flowering plant has chromosome number 76, in its somatic cells.

1. What will be the chromosome number of its nucellus, synergids, zygote, and endosperm?

2. What is the advantage of cross pollination over self pollination?

3. Give any 2 characteristics of wind pollinated flowers.

Answer 1

1. Nucellus is diploid; chromosome no is 76

Synergids are haploid;chromosome no. is 38

Zygoye is diploid; chromosome no. is 76

Endosperm is triploid its chromosome no. is 114.

2. Sexual reproduction brings about genetic recombination and results in the better Survival of the species.

3. The flowers are small and inconspicuous .they are formed in clusters. Light weight Pollens are produced in large amount. Stigma is long and hairy.