(a) List two reasons for the appearance of variations among the progeny formed by sexual reproduction.
(b)
![](https://search-static.byjusweb.com/question-images/byjus/infinitestudent-images/ckeditor_assets/pictures/5766/content_6_q_d.png)
(i) Name the part marked 'A' in the diagram.
(ii) How does 'A' reaches part 'B' ?
(iii)State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?