Question

i) Explain the disorder :
Down syndrome?​

Answer 1

Answer:

Down Syndrome:-

Down syndrome is a condition in which a person has an extra chromosome. Chromosomes are small “packages” of genes in the body. They determine how a baby's body forms during pregnancy and how the baby's body functions as it grows in the womb and after birth. Typically, a baby is born with 46 chromosomes.

Explanation:

There are three types of Down syndrome:

1. Trisomy 21. This is by far the most common type, where every cell in the body has three copies of chromosome 21 instead of two.
2. Translocation Down syndrome. In this type, each cell has part of an extra chromosome 21, or an entirely extra one. ...
3. Mosaic Down syndrome.

Answer 2

Answer:

Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome.