We know that on;y one chromosome from father is transfer to other chromosome of mother If Y chromosome a - Biology - Principles of Inheritance and Variation

Question

We know that on;y one chromosome from father is transfer to other
chromosome of mother If Y chromosome a dad connected to X
chromosome frm female and only a pair involves then how will the
twins(one boy one girl) formed??

Poonam Rawat · Accepted Answer

Dear student,

As the male and female gametes are haploid in nature, the female
gamete (egg) would have only X chromosome but the male
gamete(sperm) either have X or Y chromosome
When one sperm with X chromosome and one with Y chromosome
fertilizes two different eggs(with X chromosome) of the same
female, there is the development of two fetus together These two
fetus are unrelated to each other; one may be male or other may be
female developing inside the same uterus Such twins are called
fraternal twins

Regards

We know that on;y one chromosome from father is transfer to other chromosome of mother. If Y chromosome a dad connected to X chromosome frm female . and only a pair involves then how will the twins(one boy one girl) formed??