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(N/A) Sex determination in humansSex determination in Drosophila$1$. Humans have $44 + XY$ chromosomes in males and $44 + XX$ in females.$1$. Drosophi

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(N/A) Sex determination in humansSex determination in Drosophila$1$. Humans have $44 + XY$ chromosomes in males and $44 + XX$ in females.$1$. Drosophila has $3A + XX$ in females and $3A + XY$ chromosomes in males (where $A$ represents autosomes).$2$. Males are heterogametic $(XY)$.$2$. Males can be $XY$ or $XO$.$3$. The presence of the $Y$ chromosome is essential for maleness.$3$. The $Y$ chromosome is not essential for maleness; $XO$ individuals are sterile males.$4$. Sex is determined by the presence of the $SRY$ gene on the $Y$ chromosome.$4$. Sex is determined by the ratio of $X$ chromosomes to sets of autosomes ($X/A$ ratio).

Distinguish between: Sex determination in humans and Sex determination in Drosophila.

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Sex determination in humans	Sex determination in Drosophila
$1$. Humans have $44 + XY$ chromosomes in males and $44 + XX$ in females.	$1$. Drosophila has $3A + XX$ in females and $3A + XY$ chromosomes in males (where $A$ represents autosomes).
$2$. Males are heterogametic $(XY)$.	$2$. Males can be $XY$ or $XO$.
$3$. The presence of the $Y$ chromosome is essential for maleness.	$3$. The $Y$ chromosome is not essential for maleness; $XO$ individuals are sterile males.
$4$. Sex is determined by the presence of the $SRY$ gene on the $Y$ chromosome.	$4$. Sex is determined by the ratio of $X$ chromosomes to sets of autosomes ($X/A$ ratio).