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Which sex chromusomes determine a person sex?

Sagot :

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Answer:

Human body cells have 46 chromosomes arranged in 23 pairs. There are 22 pairs of autosomes and one pair of sex chromosomes (allosomes).

For male, the sex chromosomes are usually XY, while for female they are XX.

To make an offspring, a sperm has to join an egg cell. You should know that they only have half of the DNA of a body cell, they are the haploid. Instead of 46 chromosomes, so 23 pairs, they just have 23 chromosomes in total. 22 autosomes and one sex chromosome or allosome.

An egg cell will always have an X chromosome but the sperm will have an X or Y chromosome. If we looked this in a punnet square, the gamete from the female would always be X. So X,X. And the gamete for male would always be either X or Y.

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