Question

development of female Gametophyte

Answer 1

DEVELOPMENT OF FEMALE GAMETOPHYTE

• Development of ovule upto the formation of megaspore is called megasporogenesis.

• The ovule arises as a small projection of homogeneous tissue on the placenta in the ovary.

• The projection elongates rapidly and develops into multicellular nucellus.

• The basal region will become the funicle.

• The integuments arises as rim like out growth from the base of the nucellus.

• The integuments cover the nucellus leaving a small part at the top called micropyle.

Answer 2

Answer:

Monosporic development is the development of female gametophyte from one functional megaspore. In angiosperms, a single diploid mother megaspore undergoes meiotic division to form four megaspores (haploid). Only one out of the four megaspores is functional that forms a female gametophyte, while the rest of the three degenerate.