Long question 7 marks. Describe the process, development of Male gametophyte in flowering plants ?

Androecium:

Androecium is the third whorl, which is the male reproductive part of the flower.

Unit:

Its units are called stamen.

Stamen:

Each stamen has a thread like filament at the free end of which anther is attached.

Anther:

Anther has pollen sacs in which haploid microspores (pollen grains) are produced through meiosis.

Process:

Each microspore germinates into the male gametophyte generation. During it, the nucleus of microspore undergoes mitosis ans produces two nuclei i.e. a tube nucleus and a generative nucleus. The generative nucleus again undergoes mitosis and produces two sperms. So, a germinated microspore has a tube nucleus and two sperms. All these structures are the male gametophyte generation of the plant.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides