Question

what is apomixis ?
what is spermatogonia​

Answer 1

Answer:

1.Apomixis is an asexual reproduction that occurs without fertilization and not involving meiosis. One example of apomixis is the apomictic parthenogenesis. It its one in which the egg cell is produced through mitosis. It then develops directly into an embryo without the prior fertilization.

2.Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. ... Spermatozoa are the mature male gametes in many sexually reproducing organisms. Thus, spermatogenesis is the male version of gametogenesis, of which the female equivalent is oogenesis.

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Answer 2

Answer:

In botany, apomixis was defined by Hans Winkler as replacement of the normal sexual reproduction by asexual reproduction, without fertilization. Its etymology is Greek for "away from" + "mixing". This definition notably does not mention meiosis.

A spermatogonium (plural: spermatogonia) is an undifferentiated male germ cell. Spermatogonia undergo spermatogenesis to form mature spermatozoa in the seminiferous tubules of the testis. There are three subtypes of spermatogonia in humans: Type A (dark) cells, with dark nuclei.