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Question 83

Apart from their part in settling sex, what else is true of the human X and Y chromosomes?

  1. They carry nothing except the information that sets the sex
  2. They are made of a different substance from the other chromosomes
  3. They carry genes for other characteristics, as the other chromosomes doCorrect answer
  4. They are copied only when reproductive cells are made and not in ordinary body cells

Explanation

The sex chromosomes are chromosomes like any others, made of long lengths of DNA divided into genes that code for proteins in the usual way. Picturing them as labels that record sex and nothing else would leave a large amount of genetic material in every cell doing no work at all.

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Question 83: Apart from their part in settling sex, what else is true of… · Genetics Basics · Questena