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An organism that has an allele for brown eyes and an allele for blue eyes you?
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoheterozygous
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What if your friend has blue eyes her genes contain one allele for blue eyes and one allele for brown eyes which allele is recessive how do you know?
The brown allele is recessive. Think: Blue = B, and brown = b Your friend is Bb, or heterozygous for the gene. In heterozygotes, the expressed phenotype is the dominant gene, which in this case, apparently, is blue. Thus, because your friend does not have brown eyes, the brown allele must be recessive.
Why can a person with brown eyes carry blue eye alleles but a person with blue eyes cannot have a brown eye allele in their genotype?
Because the brown eyes allele is the dominant one.
Is eye color a homozygous recessive genetic disorder?
Blue eyes - homozygous recessive Brown eyes - homozygous dominant Brown eyes with one brown allele and one blue allele - heterozygous
Allele that is always expressed if present?
An allele that is always expressed when it is present is the dominant allele.
Are blue or brown eyes dominent?
brown eyes are dominant and are the most common eye colour half of the world has them population have them including me
What if your friend has blue eyes her genes contain one allele for blue eyes and one allele for brown eyes which allele is recessive how do you know?
The brown allele is recessive. Think: Blue = B, and brown = b Your friend is Bb, or heterozygous for the gene. In heterozygotes, the expressed phenotype is the dominant gene, which in this case, apparently, is blue. Thus, because your friend does not have brown eyes, the brown allele must be recessive.
Why can a person with brown eyes carry blue eye alleles but a person with blue eyes cannot have a brown eye allele in their genotype?
Because the brown eyes allele is the dominant one.
Is eye color a homozygous recessive genetic disorder?
Blue eyes - homozygous recessive Brown eyes - homozygous dominant Brown eyes with one brown allele and one blue allele - heterozygous
Allele that is always expressed if present?
An allele that is always expressed when it is present is the dominant allele.
What is the science term for one allele for brown eyes and one for blue eyes?
Heterochromia
What what is an example of a recessive allele?
blue eyes blonde hair etc.. brown eyes and brown hair are dominant
What is a complete sentence using the word allele?
My dad has brown eyes and my mom have blue eyes.
Are blue or brown eyes dominent?
brown eyes are dominant and are the most common eye colour half of the world has them population have them including me
Can blue eyed parents have brown eyed child?
Normally, no, they can't. This is because the allele for blue eyes is recessive, whereas the allele for brown eyes is dominant. Since both parents have blue eyes they are both homozygous recessive ie. carrying only blue eye alleles. Since both parents only carry the blue eye allele they can only pass blue eye allele on to their children. BUT, there is a fractionally small possibility that a spontaneous mutation could occur in the eye colour gene in one of their gametes that would change an allele for blue eyes into an allele for brown eyes. If this gamete then takes part in fertilization then the resultant child will have brown eyes because they are now heterozygous (one blue eye allele, one brown eye allele) with the brown eye allele being dominant. ALSO, it could happen if one of your prospective parents is a chimera - a person who has effectively two genotypes because their cells originate from two different zygotes. If one of your prospective grandparents had brown eyes and gave a brown eye allele to one of this chimera's genotypes (the one responsible for forming gametes) while the other genotype of this chimera (the one responsible for forming eyes) had only blue eyed alleles, this blue eyed person could form gametes with brown eye alleles and hence have a brown eyed baby. Human chimeras are extremely rare, but an example would be Lydia Fairchild. Isn't genetics wonderful?
Dad has brown eyes mom has hazel eyes can they have a blue eyed baby?
The greater majority (around 98%) of all new born's are born with blue eyes. You really can't tell because genes are pretty random For the answer stated above, it is obviously only true for Caucasian infants of course. Almost all infants of African, Indian, or Asian decent would obviously be brown. But with regards to the original question, the answer depends on the genetics of the brown-eyed father. If he has two brown alleles, than most likely the baby will also have brown eyes. However, if the father has one brown allele and one blue allele (and thus phenotypically brown-eyed, as brown is dominant), it is certainly possible for the baby to have blue eyes (receiving one blue allele from the father, and one blue allele from the mother...if in fact the mother is blue-green hazel). Mendelian genetics, in this case, would approximate 25% of the babies to be born blue-eyed.
What color eyes and hair will a baby have if mother has blonde hair hazel eyes father has dark brown hair brown eyes grandmother has blonde hair green eyes and grandfather has blonde hair hazel eyes?
Two alleles are responsible for determining both eye color and hair color. The allele for brown hair is dominant over the allele for blonde hair. The allele for brown eyes is dominant over the allele for blue eyes.If the organism presents with the dominant allele it can either be homozygous or heterozygous. But if it presents with either blonde hair and/or blue eyes it is homozygous for the recessivge alleles.Hazel, green and brown are all mutations of eye color but from the same allele that is responsible for brown eyes - so with the alleles there are really only to classes of eye color brown and blue - and if your not blue eyed your under brown eyes.Letting; H = brown hair and h = blonde hair and E = brown eyes and e = blue eyesMother Blonde = hh Hazel = EE/EeFather Brown = HH/Hh Brown = EE/EeI assume the grandparents are from the mothers side because 2 natural blondes should only have blonde children naturally.1/4 chance of baby being blonde 1/12 will have blue eyesAnother answerIt's very possible that a child could have red hair also with those genes. I have many family members that have a red headed child.
What is meaning of alleles?
An allele is the different forms of a gene. For example the gene for eye colour has the alleles; brown, blue, green etc. In every person there are two alleles for every gene but both alleles are not always the same. They can be dominant and recessive; dominant alleles are expressed no matter what other allele is present, recessive alleles require both alleles to be the recessive one to be expressed. E.g. say B is the allele for brown eyes and b is the allele for blue eyes. Brown is dominant therefore if someone had Bb or BB they'd have brown eyes and if they had bb their eyes would be blue.
