The gene for black hair is dominant. Which means that you only need 1 gene for black hair to override any other color gene you may also have. So, if mom and dad both don't have black hair neither of them have a gene for black hair and the baby cannot either...even if all of the grandparents have black hair. On the flip side, if both parents have black hair they can have brown, blond, or redheaded kids. Because both black haired parents may only have one gene for the black hair. In which case it is possible that their children can end up with the dormant recessive genes that are not showing up in the black haired parents.
2006-10-12 08:17:18
·
answer #1
·
answered by JordanB 4
·
2⤊
1⤋
Genes can do funny things.
I personally am Cherokee Indian and Amish. Entire family for at least 15 generations are all Black or Red heads. Nothing else. But then my middle sister and myself come out blond and blue eyed. After researching it we realized a Swed got into the family a long time ago. Took that long for those genes to fight to get to the top.
Normally black or brown is dominant over other colors if in the gene poll. But it also depends on where in the gene it is compared to red, blond, etc.
Parents that are both blond risk having red head kids cause 2 blond genes push the red gene forward where if its just one blond gene its more dominant than the red gene.
A child could easily have hair that does not match their parents, grandparents, great grandparents, and even great great grandparents.
Plus hair changes over age. I myself was born with white bleach blond hair yet today at 37 its more of a dishwater blond with red hues.
2006-10-12 08:15:10
·
answer #2
·
answered by Anonymous
·
1⤊
0⤋
Yes to all your questions. Sometimes the baby is born with black hair, and it falls out later when they're around 4 months old and comes back in blonde! And hair color can definitely skip a generation. I know a couple that has a red haired kid. Bright red hair. They are both blondes. But her father had red hair. It can even skip back to the great-grandparents.
2006-10-12 08:21:12
·
answer #3
·
answered by ThatLady 5
·
0⤊
0⤋
Yes, it is called a recessive gene.
I found this from the ALL EXPERTS website:
Every person has two copies of every gene, one from their mother and one from their father. If the two genes are the same, such as brown eyes and brown eyes, then the person is homozygous for that trait; if the two genes are different, such as one brown and one blue eye gene, then the person is heterozygous for that trait, but the dominant trait will always be expressed. For example, a heterozygote for brown eyes will have brown eyes even though he has a gene for brown and a gene for blue. If the person has two genes for blue eyes, then the person is homozygous for the recessive trait and thus will have blue eyes-- the only way a recessive trait can be expressed is if the person has two copies, or is homozygous, at that gene. In our example, brown hair or eyes is always dominant to blue or green. The trait green is dominant to blue, but is not within the same gene, but only modifies the blue trait. This is why some people have hazel, or brown-green eyes. The eyes appear green only if they are on a background of homozygous blue.
If you are homozygous recessive, then you can only give a recessive gene to your offspring; likewise, if you are homozygous dominant, then you can only give a dominant gene to your offspring. If you are heterozygous, however, there is an equal chance of giving either the dominant or the recessive gene to your offspring.
In your specific case, I cannot say exactly because it is not clear whether you are a heterozygote or homozygote for brown hair, although you are homozygous for blue eyes with the dominant modifier of green (probably homozygous for that too). Your boyfriend is definitely heterozygous dominant for brown eyes, meaning that he carries a silent recessive blue gene from his mom. He is probably homozygous dominant for brown hair color. I would guess that the baby would have brown hair with an equal chance of blue, green, or brown eyes.
Here is the link as well:
Here is another website called Understanding Genetics:
2006-10-12 20:36:49
·
answer #4
·
answered by Anonymous
·
0⤊
0⤋
A lot of babies are born with dark hair and it eventually falls out after a few months, and they get their permanent hair. The gene for dark hair is dominant, so some grandparent somewhere down the line could have had it, and it's very likely your child could end up with it.
I'm reddish/brown and my husband is brown, and our two sons are blonde. Go figure! :)
2006-10-12 08:53:32
·
answer #5
·
answered by brevejunkie 7
·
0⤊
0⤋
Yes the genetic makeup of the parents determine the final outcome of the traits the child will have. hair color can and will change with the hormonal balance of the body. It can also cause the hair to fall out or get thicker.
2006-10-12 08:14:33
·
answer #6
·
answered by outdoorsfunyoung 1
·
1⤊
0⤋
Totally. I was born with a full head of black thick hair, and now I have wavy light brown hair. It's random. My son is dirty blonde. If it was in your gene pool at some time, it can show up in your kid! Look a little further into your family tree!
2006-10-12 08:39:49
·
answer #7
·
answered by red 4
·
0⤊
0⤋
Yes parents have dominant and recessive genes, the latter may come through in other generations. the dominant gene does not always feature in children. yes it is possible for the children to have black hair if the parents are both blond
2006-10-12 08:14:17
·
answer #8
·
answered by Jaylaw 3
·
0⤊
0⤋
Yeah they can......My neice was born with the fullest head of brown hair you ever could see, by the time she was a year old tho, it had all fell out an now it's almost a white blonde color. My brother is blonde headed and his wife is brown headed. So Abby got the best of both worlds, there for a while anyways....LOL
2006-10-12 08:37:47
·
answer #9
·
answered by Crystal 5
·
0⤊
0⤋
If my kids can have dark blonde hair and me and my spouse have dark brown and black hair I am sure that a baby can have black hair without the parents having black hair.
2006-10-12 08:14:21
·
answer #10
·
answered by shabuandshabu 2
·
0⤊
0⤋