Question

Write the two events involved in the sexual reproduction of a flowering plant.
(i) Discuss the first event and write the types.
(ii) Mention the advantages and the disadvantages of that event.

Answer 1

The two events involved in the sexual reproduction of a flowering plant is Pollination and Fertilisation.

(i) Pollination is the transfer of pollen from the stamen to the stigma. Different types of pollination are self-pollination and cross-pollination.

· The transfer of pollen from the stamen to the stigma of the same flower is called self-pollination.

· The transfer of pollen from the stamen of one flower to the stigma of another is called cross-pollination.

(ii) Advantage of self- pollination - In self- pollination, there is no diversity in the genes and therefore the purity of the race is maintained. Disadvantage of self- pollination - Since there is no mixing up of genes, there are no new characters or features that are introduced into the lineage of the offsprings.