B1: Chromosomes and Mitosis Flashcards

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1
Q

what are chromosomes

A

coiled up lengths of DNA molecules.

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2
Q

the cell cycle

A

a series of stages in the life cycle of a cell

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3
Q

first stage- cell growth

A

the cell increases and grows the amount of subcellular structures

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4
Q

second stage- DNA replication

A

duplicates its DNA to form 2 copies of each chromosome

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5
Q

third stage- mitosis

A
  • nuclear membrane breaks down
  • chromosomes line up at the centre
  • one set of chromosomes is pulled to each
    end of the cell and the nucleus divides
  • forming two identical daughter cells
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