NEET BIOLOGY

Detailed explanation-1: -A gene change can sometimes cause health conditions, like cystic fibrosis and sickle cell disease. A gene change also can cause birth defects, like heart defects. Birth defects are structural changes present at birth that can affect almost any part of the body. They may affect how the body looks, works or both.

Detailed explanation-2: -Genetic abnormalities occur when there is an abnormality in one or more genes. Some genetic disorders are passed down from parents to children through their genes. Sometimes there are sporadic changes in the DNA of a gene that cause the developing baby to be affected without a prior family history.