Identify and explain in writing at least two congenital malformations among children and adults not caused by single genes or chromosome defects and at least two diseases that are caused by single genes or by abnormalities of single chromosomes.

[promo2]

Identify and explain in writing at least two congenital malformations among children and adults not caused by single genes or chromosome defects and at least two diseases that are caused by single genes or by abnormalities of single chromosomes.