A pregnant woman who has undergone an amnioce | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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

Loss of a $X$ chromosome in a particular cell during its development results in:

What is the cause of $Down's$ syndrome?

Mark the correct match.

In $Drosophila \text{ } melanogaster$, $3$ pairs of autosomes and sex chromosomes of $XO$ type give rise to a normal male in appearance. In humans, $22$ pairs of autosomes and $XO$ type of sex chromosomes result in:

Choose the correct answer regarding the following statements:
$(i)$ Sickle-cell anaemia is controlled by three pairs of alleles.
$(ii)$ Trisomy is a chromosomal disorder.
$(iii)$ $47$ chromosomes are present in a person having Turner's syndrome.

Vedclass Test Series

Exam Paper Generator

Online Exam Module