mitosis and meiosis Flashcards

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1
Q

meiosis halves ______, which then becomes _______

A

the number of chromosomes which then becomes full again in fertilisation

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2
Q

meiosis stages

A
  • chromosomes are all copied
  • the cell divides into two
  • both of these cells divide two more times forming the gametes
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3
Q

mitosis stages

A
  • the DNA replicates to form 2 copies of each chromosome
    the cell grows and copies its organelles
  • one set of chromosomes is pulled to each pole of the cell, the nucleus divides too
  • the cytoplasm and cell membrane form 2 identical cells
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4
Q

what happens after fertilisation?

A
  • the new cell divides by mitosis
  • this produces a clump of identical cells (embryo)
  • as it develops the cells differentiate forming different cell types
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