A: One drumstick per nucleus is present in th | vedclass

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Question

(A) The drumstick is a small,club-shaped appendage attached to the nucleus of neutrophils in females. It represents the inactivated $X$ chromosome,als

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

Vedclass · Answer

(A) The drumstick is a small,club-shaped appendage attached to the nucleus of neutrophils in females. It represents the inactivated $X$ chromosome,also known as the $Barr$ body. Since females have two $X$ chromosomes $(XX)$,one is inactivated to form the $Barr$ body,which appears as a drumstick in neutrophils. Males have only one $X$ chromosome $(XY)$,which remains active for transcription,so they do not possess a $Barr$ body or a drumstick appendage in their neutrophils. Therefore,both the Assertion and the Reason are correct,and the Reason correctly explains why the drumstick is present in females and absent in males.

$A$: One drumstick per nucleus is present in the neutrophil of a normal female.
$R$: It is absent in the neutrophil of a male.

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$A$: One drumstick per nucleus is present in the neutrophil of a normal female.$R$: It is absent in the neutrophil of a male.