In Mongolism or Down's syndrome, each cell has how many chromosomes?

Question

In Mongolism or Down's syndrome, each cell has how many chromosomes? (A) 21st pair having one less (B) 23rd pair with one less (C) 45 (D) 47

Tardigrade Admin · Accepted Answer

Instead of the usual 46 chromosomes present in each cell, it is observed that 47 chromosomes will be present in the cells of individuals with Down's syndrome (Mongolism). Down&rsquo;s syndrome is caused by the presence of an extra chromosome number 21 (autosomal trisomy).

Q. In Mongolism or Down's syndrome, each cell has how many chromosomes?

21^st pair having one less

23^rd pair with one less

45

47

Instead of the usual 46 chromosomes present in each cell, it is observed that 47 chromosomes will be present in the cells of individuals with Down's syndrome (Mongolism). Down’s syndrome is caused by the presence of an extra chromosome number 21 (autosomal trisomy).