35.9k views
4 votes
Can brown eyed parents have a blue eyed baby

User Zkurtz
by
5.4k points

1 Answer

5 votes
Yes, it is possible.

However, this is only possible if BOTH of the parents have a recessive allele for blue eyes, i.e. they're heterozygous.

Let only one gene is controllable of the eye color. Let the brown eye dominant allele be R and blue recessive be r. So, only if both parents have the genotypes of Rr, they can produce a baby with rr due to random selections at meiosis, and the baby phenotype would be blue eyed.

If they're both RR or at least one is, the chance of having a blue-eyed baby is impossible.
User Kakkalo
by
6.2k points