The type of sex determination in humans is

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XX-X0

Z0-ZZ

XX-XY

ZW-ZZ

answer is B.

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Detailed Solution

The type of sex determination in humans is XX-XY. The allosomes in females are XX while the allosomes in males are XY. Males are heterogametic and produce two types of sperms. Half of them carry X chromosome while the other half carry Y chromosome. All the ova carry X chromosome. Sex is dependent on the type of sex chromosome in the sperm (X or Y).

XX-X0 type of sex determination is seen in grasshoppers.

Z0-ZZ type is found in Fumea (a moth).

ZW-ZZ type is found in fowls.

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