Question

a girl of subnormal Intelligence has defective Speech and also a protuding tongue what type of genetic disorder is it explain the cause and the basis for this disorder to be detected​

Answer 1

Answer:

Down syndrome is a genetic disorder and the most common autosomal chromosome abnormality in humans, where extra genetic material from chromosome 21 is transferred to a newly formed embryo. These extra genes and DNA cause changes in the development of the embryo and fetus resulting in physical and mental abnormalities. Each patient is unique and there can be great variability in the severity of symptoms.

Explanation:

mark as BRAINLIEST

PLEASE