B2 Biology - Cell division and inheritance Flashcards Preview

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Flashcards in B2 Biology - Cell division and inheritance Deck (5)
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1

what is mitosis?

a cell division that splits to create identical copies of the original cell

2

what is meiosis?

cells spilt to form male and female gametes

3

explain the process of mitosis? ( 5 stages)

1.chromosomes are copied in nucleus (x shaped)
2.chromosomes pulled apart by cell fibres
3.membranes form round both chromosomes, nuclei of two new cells
4.the cytoplasm divides
5.two new cells

4

how many chromosomes does a human cell hold?

46 chromosomes in 23 pairs

5

explain process of meiosis? ( 6 stages)

1. start with parent cell
2.chromosomes make duplicates of DNA
3.similar chromosomes pair up
4.pairs of chromosomes divide
5.chromosomes divide
6. left with four gametes with one single set of chromosomes