Humans only have a few eye colors and only four ABO-based blood types. How can DNA tests definitively identify individuals when

Question

Paraphin [41]

4 years ago

6

Humans only have a few eye colors and only four ABO-based blood types. How can DNA tests definitively identify individuals when

many people have brown eyes or type A blood?

Biology

1 answer:

ehidna [41] · Answer 1 · 2021-12-31T15:15:32+03:00

The correct answer is that variable number repeats are used in DNA tests; they have hundreds of possible lengths. Eye color is determined by variations in a person's genes. Most of the genes associated with eye color are involved in the production, transport, or storage of a pigment called, melanin. Eye color is directly related to the amount and quality of melanin in the front layers of the iris.