what is the possibility of having a baby with blue eyes when the mother has hazel/green and the dad has brown?

Answer 1

There is no chance unless both the mother and the father are recessive for blue eyes, meaning they carry the trait but don't display it. If they both have the trait, the chances are 1in 4.

Answer 2

At most a 25% chance. Blue is a recessive gene so the baby would have to inherit the gene from both parents. If the dad has brown eyes there is a chance that he carries the blue eye allele but it is masked by the dominant brown eye allele. The same is true with the mother, hazel/green is just a partially expressed version of an allele. However, if neither parent carries these genes the possibility is 0 unless the milkman is involved of course! :-) But keep in mind that some 22 different genes have an effect on eye color so there are still several factors left in the eye color equation.

Answer 3

Well to figure that out depending on the grandparents of the baby like for example say that the mothers parents one has blue and the other blue then the mother is a carry of blue being bb. now say the father all his family has brown then he would be BB

in a punnett square would be

B= brown
b=blue

B B
b Bb Bb
b Bb Bb
meaning that the baby would have 100% chance of having brown

but if he has brown eyes and some one in his family parents or grandparents had blue eyes then he is Bb meaning he carries the blue gene

B b
b Bb bb

b Bb bb

the baby would have a 50/50 chance

if the mothers family and fathers family both has brown eyes/green eyes in them but carries the blue/hazel trait then

B b
B BB Bb
b Bb bb

the baby would have 75% brown/green 25 % blue/hazel

Answer 4

If the mother has hazel/green eyes, she is heterozygous for the eye color, Brown/blue, Brown being dominant to blue. If the father has Brown eyes, he can be Homozygous or Heterozygous, Brown/Brown or Brown/blue, respectively.

Calculations: If the mother is heterozygous, Bb and the father is homozygous, BB, then the chances are 0%. Brown will dominate. There is a 50% chance the baby will have hazel/green, though.
If the mother is heterozygous, Bb, and the father is heterozygous Bb, then the chances are 25% blue, 50% hazel/green, and 25% Brown.

Homozygous BB eyed people tend not to have their brown color fade. Heterozygous Bb eyed people tend to start their lives with brown, but later have the recessive trait come out, giving green.

Answer 5

Hazel green eyes shows that the recessive blue gene is there. The father with the brown eyes must have been heterozygous for the trait, which means it takes 2 genes for every trait and he had Bb which looks brown and not BB which is both genes brown.So he can pass on the blue gene. There is a 25% chance that the 2 blues will get together.

Answer 6

Very slim, unless both parents have the blue gene in their family. Brown is the dominate color, so with the father having brown eyes, it is more than likely the child would have brown eyes. The hazel/green? actually is cause by a blue color gene, so if the father has a dormant blue gene, then the child COULD have blue eyes.

Answer 7

Using Punnett square, given that the mother is homozygous for recessive green eye gene and the father is heterozygous for blue and green eyes in which the blue eyes are dominant:
Dad.....Brown(B).......Blue(b)
Mom
Green(g).....Bg..............bg
Green(g).....Bg..............bg
(I know I screwed up the square because I have only done upto O levels biology, but as the phenotype ratio indicates, if the mother is heterozygous, there is a 50% chance that the baby will have blue eyes as blue is dominant over green)
To be sure that the father is heterozygous, you can check the father's parents' eyes. If one of them at least has blue eyes, or their parents has blue eyes, then it is probable that the mother is heterozygous. (Homozygous means having two different genes that decides the eye colour or any other feature carrying the same information for protein formation. Heterozygous means that the two genes carry different kind of protein molecule formation information - one being dominant over the other - in which case the dominant one only expresses itself)

Answer 8

We used to think eye color was determined by one pair of genes. Brown was dominant, blue was recessive. Each parent passed on one half of the pair. If both passed on a blue, then your eyes were blue. If one passed on a blue and one a brown, then your eyes were brown. If both passed on brown, your eyes were also brown. Therefore blue eyed people had two blue, and could only pass on a blue. Two blue eyed parents therefore could not produce a brown eyed child. Two brown eyed parents COULD produce a blue eyed child if they both had one brown and one blue, and both passed on the blue. You can't know the actual chances of getting a baby with blue eyes in your case unless you know for sure if the brown eyed person has a recessive blue. It could be 1 in 4, or it could be no chance.

HOWEVER, it's more complicated now. We know there are at least THREE gene pairs that determine eye color. See the Wikipedia article (click on Genetics to skip to the interesting part) for more info.

Answer 9

Black human beings could have blue eco-friendly or hazel eyes. the two by way of a mutation of their genes of merely features handed down from their kin. that's truly uncommon for a black guy or woman to have any diverse eye colour than brown its no longer impossible,

Answer 10

1 in 2, if he has a recessive gene. zero, if he does not.

There are shades, etc. here that can occur, but basically if he has a not-brown gene, then that gene will be manifested 1 chance in 2, and blue is a likely outcome.