4.6.1.8 sex determination

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Created by
Vicky B

Cards (6)

  • how many pairs of chromosomes do ordinary human body cells have?
    23 pairs
  • how many pairs of chromosomes control characteristics?
    22 pairs
  • what does the last pair of chromosomes carry?
    the genes that determine sex
  • What are the sex chromosomes for females?
    XX
  • what are the sex chromosomes for males?
    XY
  • why is there an equal chance of having a boy or a girl?
    the X and Y chromosomes are drawn apart in the first division of meiosis