Can a Brown eyed and brown haired couple Have a blond Hair Blue eyed baby?

Question

I have a friend that married a girl 5 years ago because she said she was preggers with his baby..He and his wife both have brown eyes & hair..The baby (now 5) has very blond hair and bright blue eyes. Could this baby be his baby?

Answer 1

Blonde hair and blue eyes are both recessive traits. This means that both parents have to be carriers of the trait in order to have a child with the trait. It does not necessarily mean that both parents have to expose the trait. Since the two traits you mentioned are both the recessive forms, it is quite likely your friend's child.

Answer 2

Most definitely.

Blonde hair and blue eyes are both recessive genes. This means that most often, the brown hair and brown eyes will "overwrite" the blonde & the blue, but not always. And the genes that carry these characteristics are still there, just not used.

If the mother and the father were carrying these genes from a previous generation, and both gave blonde/blue dna to the embryo, it is entirely possible.

Answer 3

Yes it could be still because of past familiy me and my babys da has our son has blue eyes and none of us have them and our girl has blonde hair and none of us do just somewhere down the line or the chromosomes mixed but if he dontthink so then he can get a blood test i mean i would not want to raise a baby with any doubts and all i mean there will always be that doubt you can get a kit off the computer for 200 by a real docter you do it at home and send it back and they send the results or go through court and do it for 500 but it aorh it to not have that doubt but has he raised her any way isoes she see shim as dada and aal how close are they

Answer 4

It is possible but the chances of having a child with blond hair and blue eyes is very VERY small...
If both of the couple carried the heterozygous alleles for blue and brown eyes (i.e they both carried the genes for blue and brown eyes) then theres a tiny chance of any of their offspring inheriting blue eyes, even though brown eyes is a dominant trait, but if both of the child gets two of the blue recessive alleles then the child will have blue eyes. As for the hair, i think its the same principle...

Answer 5

Sure. Brown eyes are dominant, so each parent could have one blue gene, one brown. Same with the hair, one brown, one blonde each. Then they each donate their blue and blonde genes to the baby, and volia! There is a 1/16 chance of this happening...so not so unlikely, but she still could have cheated!

Answer 6

Well, brown eyes are dominant, but they often aren't 100% dominant. Most brown/blue crosses result in hazel eyes. Sometimes green.

The way it would probably work is:
Blue eyed/Blonde haired grandparent (one on each side)
Brown eyed/Brown haired grandparent (one on each side)

That would (possibly) give a Brown/Brown child per side, each with recessive traits for blue eyes and blonde hair. Now, hair color is also a not-exactly-dominant trait. Meaning, a brown/blonde cross usually results in a light-brown-haired child.

Wait a bit, though, to see what color the baby's hair turns out to be. My brother and uncle both had blonde hair as young children, and it turned out brown when they got older. They both have blue eyes. My dad had brown hair, and my mom had black hair with copper highlights (wish I inherited that!) His parents both had brown hair, and my mom's dad had red hair and her mom had black hair.

Heredity is a tricky little sucker when it comes to hair and eye color. You can't rule out stuff like that happening. I wouldn't accuse anybody of cheating based on something like that unless absolutely NOBODY on either side of the family had blue eyes, ever. My dad has blue eyes, my mom hazel, and my brother got blue eyes and brown hair, and I have hazel eyes and black hair.

Answer 7

Yes. Because brown hair and brown eyes are dominant traits, the blond and blue-eyed genes could be present, just masked because they are recessive.

Answer 8

But of course, Hello, Genetics. I have a cousin both parents brown hair brown eyes he has blonde hair hazel eyes. His great grandpa has blonde hair

Answer 9

if you have blonde hair it will naturally get bleached by the particular sun in the summer. There was this guy in my class who also had golden blonde hair that had been a medium brown near the base. When he came back to school after summer vacation, it was nearly platinum blonde!

Answer 10

Yep. Basic biology. Dominant genes vs. recessive ones. Straightforward stuff.