The number of sex chromosomes is normal in

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

Question

(D) In $Down's$ syndrome,the chromosomal abnormality is an autosomal aneuploidy,specifically $trisomy$ of chromosome $21$. The total number of chromos

Vedclass · Accepted Answer

Down's syndrome

Vedclass · Answer

(D) In $Down's$ syndrome,the chromosomal abnormality is an autosomal aneuploidy,specifically $trisomy$ of chromosome $21$. The total number of chromosomes is $47$ ($45 + XY$ or $45 + XX$). Since the sex chromosomes ($XX$ or $XY$) remain in their normal pair configuration,the number of sex chromosomes is normal. In contrast,$Turner's$ syndrome $(45, XO)$ has one sex chromosome,$Klinefelter's$ syndrome $(47, XXY)$ has three sex chromosomes,and $Super$ female $(47, XXX)$ has three sex chromosomes.

Similar Questions

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?

The movement of a gene from one linkage group to another is called

Which of these is not a Mendelian disorder?

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

Which one of the following is a type of hyperploidy?

Vedclass Test Series

Exam Paper Generator

Online Exam Module