Down syndrome is a genetic disease associated with physical and developmental disabilities in children. Children born with this condition have an extra chromosome 21, and there are three types of Down syndrome based on variation in chromosome 21. However, irrespective of the types, some common features of children with Down syndrome are as follows: Small ears, hands, and feet Short neck and stature Lax joints Hypotonia Eyes slanting at the corner Protruding tongue Question: Match the correct pairs of types of Down syndrome with the presentation of chromosome 21 in the cells. Group 1: a. Trisomy 21 b. Mosaicism c. Translocation Group 2: i.
There are 46 chromosomes. An additional full or partial chromosome 21 is attached to a different chromosome. ii. There exist three copies of chromosome 21 instead of two. iii. There is a mixture of types of cells: Some have 46 chromosomes, while others…
