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(B) : The establishment of sex through differential development in an individual at an early stage of life is called sex determination.It is determine

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Due to the genetic makeup of the particular sperm that fertilizes the egg

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(B) : The establishment of sex through differential development in an individual at an early stage of life is called sex determination.It is determined at the time of fertilization and is also called syngametic sex determination.The female is homomorphic,possessing two similar sex chromosomes,$XX$,and the male is heteromorphic,possessing one $X$ chromosome similar to that of the female and one shorter,morphologically different $Y$ chromosome.The female is homogametic (produces similar eggs) and the male is heterogametic (produces two types of sperms,$i.e.$,$X$ or $Y$).Sex is determined at the time of fertilization by the kind of sperm ($X$ or $Y$) that fuses with the ovum $(X)$.

In our society,women are often blamed for producing female children. Choose the correct answer regarding sex determination in humans.

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$A$ male child would be born to parents if

Sex chromosomes of a female bird are represented by

Organism with male heterogamety $- P$
Organism with female heterogamety $- Q$
$I -$ Human,$II -$ Bird,$III -$ Drosophila,$IV -$ Grasshopper
Select the correct option for $P$ and $Q$.
$\quad P \quad\quad Q$

If a couple has $5$ daughters,what is the probability that the $6$th child will be a boy?

In humans,sex determination is controlled by which of the following?

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