Why does genetic disorder exist?

A genetic disorder is a disease caused in whole or in part by a change in the DNA sequence away from the normal sequence. Genetic disorders can be caused by a mutation in one gene (monogenic disorder), by mutations in multiple genes (multifactorial inheritance disorder), by a combination of gene mutations and environmental factors, or by damage to chromosomes (changes in the number or structure of entire chromosomes, the structures that carry genes).

monogenic disordermultifactorial inheritance disorder

Explanation:

hope this helps :D

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

the answer is c. altitude. hope this ! #brainiac