A pregnant woman who has undergone an amnioce | vedclass

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(D) The presence of a $Barr$ body is determined by the formula $N - 1$,where $N$ is the number of $X$ chromosomes. $A$ normal male $(XY)$ has $0$ $Bar

Vedclass · Accepted Answer

Klinefelter syndrome

Vedclass · Answer

(D) The presence of a $Barr$ body is determined by the formula $N - 1$,where $N$ is the number of $X$ chromosomes. $A$ normal male $(XY)$ has $0$ $Barr$ bodies,and a normal female $(XX)$ has $1$ $Barr$ body.An extra $Barr$ body in an embryo indicates the presence of an additional $X$ chromosome. $Klinefelter$ syndrome is characterized by the genotype $XXY$. In this case,the number of $Barr$ bodies is $2 - 1 = 1$. However,if the question implies an 'extra' $Barr$ body compared to a normal male embryo (which has $0$),or if it refers to a condition like $XXX$ (Triple $X$ syndrome) or $XXY$ ($Klinefelter$ syndrome),$Klinefelter$ syndrome is the most standard clinical association for an extra $X$ chromosome in a male-developing embryo.

$A$ pregnant woman who has undergone an amniocentesis test finds an extra $Barr$ body in her embryo. Which syndrome is likely to be associated with the embryo?

Similar Questions

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?

If somatic cells of a human male contain a single Barr body,the genetic composition of the person would be:

$A$ human with $45$ chromosomes having only one $X$ chromosome $(XO)$ suffers from which of the following disorders?

What is Down's syndrome? Give its symptoms and cause. Why is it that the chances of having a child with Down's syndrome increase if the age of the mother exceeds forty years?

In humans,sometimes during gametogenesis,sex chromosomes do not separate,resulting in a chromosome number of $45$,$47$,or $48$. In this condition,which of the following genotype and phenotype combinations is correct?

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