Sex Determination | Principle Of Inheritance And Variation | Sex Chromosomes

Sex Determination | Principle Of Inheritance And Variation | Class 12 Biology
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Males have the sex chromosomes X Y
Whereas females have the sex chromosomes X
A female's gamete can be X or X, whereas amale's gametes can be X or Y.
A female can only pass on the X chromosome to her offspring.
If the mnan passes on his X chromosome, the child's genotype will be X Y,
and will be a boy. If the man passes on his Xchromosome, the child's genotype will be X X,will be a girl.
The chance of a girl is 50%. The chance of aboy is 50%.
inheriting Sex (xx-xy)
Sexual reproductive organisms are of two types, unisexual and bisexual. In some animals such as humans etc., the difference between the physical structure of male and female is also obvious, it is called sexual dimorphism. Bisexual animals (eg,earthworms etc.) have both male and female reproductive organs in the body of a single animal. Children born from it are also of this type. Since ancient times, the process of gender discrimination of monogamous organisms has been discovered, due to which there is a gender difference from the very beginning (in the offspring). Scientists likeHanking, Mc.Clung, Wilson etc.have foundout the real and scientific basis of genderdetermination. McLung (1902 AD) presentedchromosomal theory of sex determination.According to this
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