Question

Congenital diseases are caused due to the following reasons​

Answer 1

Answer:

Genetic or inherited causes include: chromosomal defects – caused by too few or too many chromosomes, or problems in the structure of the chromosomes, such as Down syndrome and extra copy of chromosome 21 and sex chromosome abnormalities. single gene defects – a mutation in one gene causes the defect.

Explanation:

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Answer 2

Genetic problems. One or more genes might have a change or mutation that results in them not working properly, such as in Fragile X syndrome. ...
Chromosomal problems. ...
Infections. ...
Exposure to medications, chemicals, or other agents during pregnancy.