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Cell division, cell diversity and cellular organisation

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Question 23

Meiosis is a key source of genetic variation in sexually reproducing organisms.

Which of the following processes contribute to genetic variation during the first meiotic division (meiosis I)?

  1. Crossing over between non-sister chromatids of homologous chromosomes
  2. Independent assortment of homologous pairs of chromosomes
  3. Separation of sister chromatids to opposite poles of the spindle
A

1, 2 and 3

B

only 1 and 2

C

only 2 and 3

D

only 1

Markscheme

Cell division, cell diversity and cellular organisation Questions

  1. A Level
  2. /Biology
  3. /Cell division, cell diversity and cellular organisation

40 exam-style questions on OCR A A Level Biology Cell division, cell diversity and cellular organisation. Each one has a worked solution and a mark scheme showing where the marks go.

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