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B2 6.1c – Student worksheet
Questions of division
1
2
a
What are human male gametes called? (1 mark)
b
Where are they formed? (1 mark)
a
What are human female gametes called? (1 mark)
b
Where are they formed? (1 mark)
Fruit flies have four pairs of chromosomes in a normal body cell. Houseflies have six pairs of
chromosomes.
3
Each of these drawings shows a nucleus.
a
Which drawing shows a nucleus from:
i
a sperm cell from a housefly
ii
a normal body cell from a fruit fly
iii an egg cell from a fruit fly
iv a body cell from a house fly? (4 marks)
4
5
b
Explain how you chose your answer to part a i. (2 marks)
a
In which part of the human body does mitosis occur? (1 mark)
b
In which part of the human body does meiosis occur? (1 mark)
The table shows the number of chromosomes found in a normal body cell of different species.
How many chromosomes in total would you expect to find in each of these cells?
a
a human body cell (1 mark)
b
a horse sperm cell (1 mark)
cat
38
c
a king crab egg cell (1 mark)
human
46
horse
64
king crab
208
d
a fertilised egg cell from a cat (1 mark)
Species
Chromosome number
Sheet 1 of 1
250
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