NEETBotanySexual Reproduction in Flowering Plants
Arrange the following in the correct developmental sequence related to megasporogenesis and female gametophyte formation in angiosperms : A. Megaspore tetrad B. Megaspore mother cell C. Embryo sac D. Functional megaspore Choose the correct answer from the options given below :
Options
- AB, A, D, C
- BB, D, A, C
- CB, A, C, D
- DC, D, A, B
Correct answer
A. B, A, D, C
Step-by-step solution
During megasporogenesis, a single cell in the nucellus differentiates into a diploid Megaspore Mother Cell (MMC). The MMC undergoes meiotic division to form a linear Megaspore tetrad (four haploid megaspores). In a majority of angiosperms, three megaspores degenerate and one remains as the Functional megaspore. This functional megaspore then undergoes mitotic divisions to develop into the female gametophyte, which is the Embryo sac. The correct developmental sequence is: Megaspore mother cell Megaspore tetrad Funct