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26 February, 07:15

What causes the differences in physical characteristics like hair color among people?

A: different version of genes

B. Variations in DNA length

C. Different number of chromosomes

D. Variations in nucleus size

Hurry in a test

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Answers (1)
  1. 26 February, 08:07
    0
    A

    Explanation:

    isn't really that hard ... no offence
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