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Chromosomal Inheritance

AP Biology· difficulty 2/5

X Y X X XX XY XX XY

From this cross, the probability of a child being male is

  • A

    0%

  • B

    50%

    check_circle
  • C

    100%

  • D

    25%

Explanation

Two of four boxes are XY (male). Sex is determined by which sex chromosome the father contributes — X or Y — at 50:50.

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