AP BIOLOGY

Detailed explanation-1: -Megasporogenesis refers to the development of megaspores from the megasporocyte, the cell that undergoes meiosis. Meiosis of the megasporocyte nucleus results in the formation of four haploid megaspore nuclei. In most taxa, meiosis is followed by cytokinesis, resulting in four megaspore cells.

Detailed explanation-2: -A diploid megasporocyte exists in the ovule, which is found within the ovary; the megasporocyte divides by meiosis to produce four haploid megaspores, only one of which survives. The surviving megaspore goes through mitosis to produce seven haploid cells. These seven cells form into the female gametophyte.

Detailed explanation-3: -Final answer: Megaspores are produced from the megaspore mother cells after Meiotic division.

Detailed explanation-4: -In an analogous scenario in ovules, megasporocytes produce magaspores by meiosis, which eventually form the female gametophyte (embryo sac). The key to successful gametogenesis is to have normal meiosis divisions. In diploid species, meiosis is a straightforward phenomenon and often results in haploid gametes.

Detailed explanation-5: -The Megagametophyte and the Central Cell In majority of angiosperm plants, both male and female gametes are produced after meiosis following a series of divisions of haploid spores (Figure 1).