Describe chromosomal theory of sex determination ?

1.	Describe chromosomal theory of sex determination ?
Answer» In diploid organisms, a pair of chromosomes determines the sex of individual. They are called the sex chromosomes or allosomes or heterosomes. Sex determination is the process by which the fertilised egg develops the characters of either the male or female. This process occurs at the time of fusion of egg and sperm.2 conditions The female has XX chromosome and male has XY hence during zygote formation the egg has X chromosome and it depends on the sperm which chromosome it is carrying. If it is carrying Y chromosome the zygote will be of XY that is a male.If the sperm is carrying X chromosome then the zygote will be of XX that is female.

Answer»

In diploid organisms, a pair of chromosomes determines the sex of individual. They are called the sex chromosomes or allosomes or heterosomes. Sex determination is the process by which the fertilised egg develops the characters of either the male or female. This process occurs at the time of fusion of egg and sperm.2 conditions

The female has XX chromosome and male has XY hence during zygote formation the egg has X chromosome and it depends on the sperm which chromosome it is carrying. If it is carrying Y chromosome the zygote will be of XY that is a male.If the sperm is carrying X chromosome then the zygote will be of XX that is female.

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