Question

How do spermatogenesis and oogenesis differ in terms of the number of gametes they produce?

Answer 1

In spermatogenesis the sex cell divides (from 46 chromo to 23), and then divides again to produce 4 haploid cells that become sperm. In oogenesis the sex cell divides into one ovum and a polar body in the first division, and in the second division the ovum divides again into a haploid (ovum) and a polar body, and the polar body divides into two more polar bodies. Polar bodies are non-functional, so only one ovum is produced in the end. Spermatogenesis produces millions of sperm, while oogenesis only produces one mature ovum a month.

Answer 2

Oogenesis is the creation of the female gamete and spermatogenesis is the creation of the male gamete.

Meiosis begins in male once they reach puberty (they do both meiosis I and II) and do it for the rest of their lives non-stop
Females begin Meiosis I in the womb and they don't start to do Meiosis II until they reach puberty. Unlike males, females don't form gametes non stop and they stop forming gametes at menopause.

The end result for males are four sperm cells
For females, they create three small polar bodies and one big daughter cell. The polar bodies give themselves up and give their nutrients to the big cell. So for females, they create only one gamete while males create four.

I hope this is helpful =)

Answer 3

If that didnt help Heres another thought: spermatogenesis makes sperm in the testes and oogenesis makes eggs in the ovaries, but there are some other differences.

After the 2 meiotic divisions in a single spermatogonium, you get 4 spermatids, which undergo maturation to form 4 sperm cells, or spermatozoa. They are hardly more than a packet of DNA, with a flagellum powered by mitochondria and an acrosome containing enzymes to penetrate the egg cell membrane.

After the 2 meiotic divisions in the single oogonium, you get one ovum and three polar bodies. Each time the oocyte divides, most of the cytoplasm goes into one product and the other one (the polar body) just gets a set of chromosomes. So the resulting single ovum is quite large compared to a sperm cell.

Another thing. Spermatogenesis goes on in a male from puberty almost until death. In females, oogenesis goes on from before birth until menopause. Females are born with about 40,000 primary oocytes, so they have already begun maturation. The first meiotic division, producing secondary oocytes, occurs after puberty, but the second meiotic division doesn't occur unless fertilization occurs. Secondary oocytes are what gets ovulated, and only one per month.

So there are two different strategies going on here. The male makes millions of tiny sperm while the female invests all her energy in one egg, and even goes to the point of conserving that energy further by not completing meiosis unless there is fertilization. Interesting....

Answer 4

Hope i helped :D