Which cell secrete sperms leydig cells or sertoli cells?

This process does not start until puberty when LH stimulates the Leydig cells to produce testosterone. FSH stimulates the Sertoli cells to secrete androgen-binding protein into the lumen of the seminiferous tubules.

ability to bond woth oxygen

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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