a human body has cell contains 46 chromosomes.How many chromosomes would a human egg cell (unfertilized) have?
need help im doing a reasearch paper...heres the full question........a human body has cell contains 46 chromosomes.How many chromosomes would a human egg cell (unfertilized) contain?
- Anonymous1 decade agoFavorite Answer
- 1 decade ago
- Anonymous1 decade ago
23Source(s): my science book
- CirbrynLv 71 decade ago
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- Bob D1Lv 71 decade ago
The human unfertilized egg cell contains 46 chromosome before fertilization by a haploid sperm cell.
("As is the case in most mammals, the secondary oocyte is triggered to undergo and complete division II of meiosis "only" if it is fertilized by a sperm."
"These induced primary oocytes complete meiotic division 1 to form a small (first) polar body and a large secondary oocyte; this secondary oocyte subsequently undergoes meiotic division 2 to form a second small polar body and a large mature ovum. ....")
Activation (fertilization) by the sperm cell triggers the completion of the meiotic division 2 where the then diploid ovum nuclei forms the second haploid polar body which is lost at the surface of the egg cell. Only then is the egg ready for its haploid genome to fuse with that of the sperm DNA.
See: Molecular Biology of THE CELL
by Bruce Alberts, Dennis Bray, Julian Lewis, Martin Raff, Keith Roberts, James D. Watson.
ISBN: 0-8240-7282-0Source(s): self
- Gol NLv 41 decade ago
the egg has 23, and the sperm has 23
- RaeLv 44 years ago
none of these people answered right :( sperm and egg have 23---because if you pair an egg and a sperm to make an offspring you get 46 which is the right number. daughter cell from MITOSIS has 46 -- that's a body cell daughter cell from MEIOSIS II has 23 -- that's a sperm or egg
- 1 decade ago
half of 46