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16 July, 07:41

The extra chromosome which produces Down's syndrome is:

Options:

an autosome

a "X" chromosome

a "Y" chromosome

either "X" or "Y" chromosome

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Answers (2)
  1. 16 July, 07:55
    0
    Answer: it would be x because when a child is born with down syndrome, that means the female gave 2 x chromosones and the male gave one x and one y chromosone.
  2. 16 July, 08:09
    0
    the extra chromosome is "y"
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