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Question 77

What does one human sperm cell carry at the sex chromosome pair?

  1. Always a Y chromosome
  2. Always an X chromosome
  3. Both an X and a Y chromosome together
  4. Either an X or a Y chromosomeCorrect answer

Explanation

The cells that make sperm hold one chromosome of each kind, and each sperm receives just one member of that pair, so about half of all sperm carry each kind. A sperm carrying both would leave the offspring with three sex chromosomes instead of a pair, which is not how gametes are formed.

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Question 77: What does one human sperm cell carry at the sex chromosome… · Genetics Basics · Questena