Question

A question from the Biology students...
If X-X chromosomes fuses,baby girl takes birth...
and
X-Y chromosomes fuses,baby boy takes birth..

Do Y-Y chromosomes really exits..??

Answer 1

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No,Y-Y CHROMOSOME REALLY EXITS.


A zygote is formed when egg fuses with sperm. Now, both egg and sperm are haploid cells, i.e. they have one set of chromosomes (22 +X in females and 22 + X/Y in males). So, only one set of chromosomes from male and female fuses to form a diploid zygote. So chromosomes are not dead.
Chromosomes are present in every cell found in humans.