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28 October, 18:12

This is the biological determination system for the sex of an offspring.

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  1. 28 October, 18:25
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    x & Y chromosomes determine their sex

    Explanation:

    XX = Female

    XY = Male

    The way sex is determined is by the sperm cell, which may contain eithr X or Y chromosomes while the ovaries/eggs are always X
  2. 28 October, 18:39
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    chromosomes, the X and the Y.

    Explanation:

    Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the male that determines the sex of the offspring when fertilization occurs.
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