An infant with $XX$ chromosomes results in a .........,whereas an infant with $XY$ chromosomes results in a ..........

In which of the following organisms are sex chromosome pairs $NOT$ found?

In which of the following organisms is female heterogamety observed?

Given below are two statements.
Statement $I$ - $X$ Chromosome has a large amount of euchromatin and a small amount of heterochromatin.
Statement $II$ - The homologous region of the $X$ Chromosome contains a smaller number of genes than the $Y$ Chromosome.
In the light of the above statements,select the correct option given below:

In humans,the determination of a female offspring is decided by which of the following?

The sex of a child is determined by whom?