The male human is represented by sex chromo-somes
$XX$
$XO$
$XY$
$YY$
It's Obvious
How is sex determined in human beings?
Assertion : In humans, the gamete contributed by the male determines whether the child produced will be male or female.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.
Definitions / Explanation : Sex determination
The sex chromosomes in females are
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