Question

(a) List two reasons for the appearance of variations among the progeny formed by sexual reproduction. (b) (i) Name the part market ‘A‘ in the diagram. (ii) How does 'A’ reaches part 'B‘ ? (iii) States the importance of the part 'C'. (iv) What happens to the part marked ‘D' after fertilisation is over?

Answer 1

Answer:

two parents are involved.

only the dominant gene is discoverable

Explanation:

Answer 2

Dear Student,

◆ Answers -

(a) Progeny after sexual reproduction are different because -

(i) Gametes of two parents are involved

(ii) There is independent assortment of genes

(b) (i) Part marked A in diagram is pollen grain.

(ii) Pollen grain (A) reaches stigma (B) by the process of pollination.

(iii) Pollen tube (C) is important for transport of pollen grain to stigma.

(iv) Egg (D) is converted into embryo after fertilization.

Hope I was useful...