Question

Describe why does human female sometimes have xy sex chromosomes instead of xx.​

Answer 1

Answer:

• XX/X0 sex chromosomes In this variant of the XY system, females have two copies of the sex chromosome (XX) but males have only one (X0). The 0 denotes the absence of a second sex chromosome.

• Generally in this method, the sex is determined by amount of genes expressed across the two chromosomes.

Answer 2

Answer:

A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two sexes. Occasionally, there are hermaphrodites in place of one or both sexes. There are also species that are only one sex due to parthenogenesis the act of a female reproducing with out fertilization.

In many species, sex determination is genetic: males and females have different alleles or even different Genees that specify their sexual morphology.

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