Reproduction - (Mar/27/2007 )

1. In sexual reproduction, man has primary sex cells in the testes, so my questions is: how many primary sex cells release sperms once? it's not that only one primary sex cell releases sperms once, right? It can be 'many' primary sex cells release sperms at the same time? So how about women? How many primary sex cells release eggs once?
2. Binary fission is an asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size, so for an example, if a paramecium reproduces, itself divides into two other parameciums? so itself dies?

Thanks for help!

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Not sure if this is what you're after, but...
1. Spermatogenesis produces four sperm for each cell. The final stage of the process starts out with a diploid cell which reproduces my mitosis, then divides by meiosis, producing 4 haploid sperm. By contrast, each oogenesis produces 1 ovum and three small non-fertile bodies attached (these contain DNA, but not much else).
2. I don't think we thino f othe paramecium as dying when it reproduces. It just makes two of itself.

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Organisms reproducing in this way are called "potentially immortal" and you get normally two clones. So it has just duplicated and can live on twice. (What about the identity/ego of the first cell, if it has, ask a philosopher )

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