A: XO type sex determination is found in a la | vedclass

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Question

(A) In the $XO$ type of sex determination,males have only one $X$-chromosome and some other autosomes,while females have a pair of $X$-chromosomes.Dur

Vedclass · Accepted Answer

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) In the $XO$ type of sex determination,males have only one $X$-chromosome and some other autosomes,while females have a pair of $X$-chromosomes.During spermatogenesis,males produce two types of gametes: $50\%$ of the sperms carry the $X$-chromosome,and $50\%$ do not carry any sex chromosome.This mechanism is observed in many insects,such as grasshoppers.Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for the Assertion.

$A$: $XO$ type sex determination is found in a large number of insects.
$R$: Some of the sperms bear the $X$-chromosome,whereas some do not.

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$A$: $XO$ type sex determination is found in a large number of insects.$R$: Some of the sperms bear the $X$-chromosome,whereas some do not.