Chromosomal Inheritance

AP Biology· difficulty 3/5

A carrier mother (X^C X^c) and normal father (X^C Y) have children. What is the probability that a son is color blind?

  • A

    3/4

  • B

    1/4

  • C

    1/2

    check_circle
  • D

    1/8

Explanation

Sons get Y from father and either X^C or X^c from mother — 1/2 chance of X^c (color blind).

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