Forums Science Assignment Help Biology How is sex determined in humans?

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    ankita
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    How is sex determined in humans? It’s a little more complicated that just XX or XY.

    #16125
    ankita
    Member

    Answer:

    It is well-established fact that Y chromosome determines the sex of an individual. It is the Y chromosome that has the information for the determining the sex of an individual.

    Early embryos are hermaphroditic they have the potential to develop either into male or female, and the phenotype of gonads remains undetermined. The tissue of the gonadal ridge has the ability to develop into either male or female gonads and further development of the embryo is followed by the migration of primordial cells into these ridges which further forms the outer cortex and inner medulla giving rise to outer tissues and inner tissues respectively. The cortex can develop into ovary and medulla into a testis. Each embryo consists of Mullerian and Wolffian ducts, two sets of undifferentiated ducts which further lay down the structure of female and male reproductive tract respectively. Bipotential gonads are the term given to the gonadal ridges because of capacity to develop into either ovaries or testis. The presence or absence of Y-chromosome form basis of differentiation into bipotential gonads. If the Y-chromosome is present, then in a seventh week the differentiation of bipotential gonads will lead to the differentiation into male gonads and the released hormone from the embryonic testicular tissue will continue Male differentiation and other Mullerian duets will degenerate. If Y-chromosome is absent, it will continue to develop the female reproductive parts by the 12th week of gestation the process of miosis in the oogonium starts and by the 25th week of gestation, primary oocytes get arrested in oogonium.

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