AQA Biology meiosis

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When cells divide in meiosis 1, the cells produced are haploid. Why?? I tried asking but it still doesn't make sense.

Posted Wed 16th May, 2012 @ 18:07 by Sarah

2 Answers

  • 1 vote

Haploid= 1 complete set of chromosomes (23 pairs or 46 single chromosomes), but meiosis happens in gamates (sex cells e.g. testes, human eggs), and each gamate contains half the genetic information to create a human.

Meiosis in the testes:

1) A parent cell contains half genetic information so half the number of chromosomes (half 23 pairs)

2) The cell creates another identical set of chromosomes

3) The cell divides and two new cells are created, each with the same number of chromosomes as the original cell (half of 23 pairs)

4) Each of the two new cells creates a set of identical chromosomes, creating 2 cells with 23 pairs

5) The two cells divide, creating 4 cells each with half of 23 pairs which is equal to the original parent cell (gamate) with half of 23 pairs

I hope this makes sense!

Answered Sat 19th May, 2012 @ 14:27 by lalala
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A haploid cell is cell that contains one complete set of chromosomes. E.g. in humans this is 1 set of 23 chromosomes (Haploid cells). Diploid cells in humans have 2 sets of 23 chromosomes.

I hope this helps, :)

Answered Thu 17th May, 2012 @ 16:09 by Elle Belle