Question

Doctors and scientists now have the ability to sequence a person's DNA to look for abnormalities. One common example of genetic testing is screening for an extra chromosome 21 in human fetuses. This test is used to detect if a child will have Down's Syndrome. Do some research and describe another example of genetic testing. What specifically do they look for in the DNA? How can genetic testing be beneficial and how far should we take it?

plzzz ans asap........

Answer 1

Genetic screening can be performed for several chromosomal abnormalities during pregnancy.
Ex: Down's syndrome, Patau-syndrome, and Cri-du cat syndrome

Patau syndrome:
It is characterized by trisomy 23 = Extra chromosome 13 (Or part of chromosome 13)
Patau syndrome frequency = 1 in 20000
Symptoms:
i. Intellectual disability and Meningomyelocele
ii. Polydactyly and cyclopia
iii. Abnormal genitalia and cleft palate
iv. Kidney defects

During prenatal scanning, doctors look for the presence of an extra chromosome 13 (Or part of chromosome 13).

Genetic screening is largely a beneficial method. It allows us to detect several abnormalities during the early stages and take necessary actions either to prevent or to alleviate the symptoms.
However, genetic screening should be confidential and must follow certain ethical principles.
It should not be allowed to screen for any trivial traits such as height or complexity. There must be strong regulation over who utilizes it and for what purpose. It should only be allowed for ethical reasons.