6.1 Reproduction

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Question 15
Medium

Cell division by meiosis forms gametes.

The graph below shows the mean mass of DNA per cell in arbitrary units before, during, and after meiosis.

Mean mass of DNA per cell vs time

Use the graph to answer the following questions:

a.

When is the DNA in the chromosomes being copied? Select the correct time interval:

  • Between 000 and 444 hours
  • Between 444 and 666 hours
  • Between 666 and 888 hours
  • Between 888 and 101010 hours
[2]
b.

Which two times represent the points at which a cell divides?

[2]
c.

What is the mean mass of DNA (in arbitrary units) in a gamete?

[2]
d.

What is the mean mass of DNA (in arbitrary units) in an embryo cell?

[2]

6.1 Reproduction Questions

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