The male human is represented by sex chromo-somes
$XX$
$XO$
$XY$
$YY$
It's Obvious
$X$ -chromosome or $X$ – body was first observed by………….
In melandrium the sex determination type is
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.
A man receives his $X$ chromosomes from
Male child will be born if
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