A: Turner's syndrome generally does not occur | vedclass

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(A) Turner's syndrome is characterized by the $XO$ genotype $(44 + XO)$,which results in a female phenotype with underdeveloped ovaries and other phys

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

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(A) Turner's syndrome is characterized by the $XO$ genotype $(44 + XO)$,which results in a female phenotype with underdeveloped ovaries and other physical abnormalities.It does not occur in males because the presence of at least one $X$ chromosome is essential for the survival of the human embryo.The $YO$ condition $(44 + YO)$ lacks an $X$ chromosome,which contains many vital genes necessary for development and survival.Therefore,a foetus with a $44 + YO$ chromosomal complement is non-viable and generally dies during early embryonic development.Thus,both the Assertion and the Reason are correct,and the Reason correctly explains why Turner's syndrome is not observed in males.

Column-$I$ (Disorder)	Column-$II$ (Ploidy)
$P$. Down's syndrome	$I$. Sex chromosomal trisomy
$Q$. Klinefelter's syndrome	$II$. Sex chromosomal monosomy
$R$. Turner's syndrome	$III$. Autosomal trisomy

$A$: Turner's syndrome generally does not occur in males.
$R$: Foetus with $44 + YO$ complement generally dies.

Similar Questions

In a diploid organism,the formation of a multivalent during meiosis is due to:

Match the following columns:

Column-$I$ (Disorder) Column-$II$ (Ploidy)

$P$. Down's syndrome $I$. Sex chromosomal trisomy

$Q$. Klinefelter's syndrome $II$. Sex chromosomal monosomy

$R$. Turner's syndrome $III$. Autosomal trisomy

What would be the number of chromosomes in the ovum (fertilized by a normal sperm) that resulted in the appearance of Klinefelter's syndrome in the offspring?

Down's syndrome occurs in the $21^{st}$ pair of chromosomes due to the presence of an additional chromosome.

What is the number of Barr bodies in an individual with Klinefelter syndrome?

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$A$: Turner's syndrome generally does not occur in males.$R$: Foetus with $44 + YO$ complement generally dies.