Admin Table of Contents
- 1 How could a set of parents with brown eyes produce a child with blue eyes?
- 2 What are the genotypes for blue eyes?
- 3 Can parents with brown eyes have blue?
- 4 Can green and brown eyes make blue?
- 5 How do 2 brown eyes make blue?
- 6 What is the genotype of a child with both brown eyes?
- 7 Are brown eyes dominant or recessive?
How could a set of parents with brown eyes produce a child with blue eyes?
The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive. If both parents have brown eyes yet carry the allele for blue eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes.
What will be the genotype of a brown eyed woman who has a blue eyed child?
If B is the allele for brown eyes and b is blue, the genotype of the blue-eyed man is bb. His wife must be a Bb heterozygote–she must have a B allele (she has brown eyes), but she must also have inherited a b allele from her blue-eyed mother (whose genotype was bb)….
| R | B | |
|---|---|---|
| W | RW (red) | BW (blue) |
What are the genotypes for blue eyes?
Finally, the genotype of an organism with two recessive alleles is called homozygous recessive. In the eye color example, this genotype is written bb. Of these three genotypes, only bb, the homozygous recessive genotype, will produce a phenotype of blue eyes.
How is it possible for 2 brown eyed parents to have a blue eyed child brown eyes are the dominant trait?
Eye color is not an example of a simple genetic trait, and blue eyes are not determined by a recessive allele at one gene. Instead, eye color is determined by variation at several different genes and the interactions between them, and this makes it possible for two blue-eyed parents to have brown-eyed children.
Can parents with brown eyes have blue?
Brown (and sometimes green) is considered dominant. So a brown-eyed person may carry both a brown version and a non-brown version of the gene, and either copy may be passed to his children. Two brown-eyed parents (if both are heterozygous) can have a blue-eyed baby.
Is eye color genotype or phenotype?
The visible eye color is your phenotype, but it tells us nothing about your genotype. Multiple different genes affect eye color in humans, and any of them could manifest dominant or recessive traits in your phenotype – that is, the unique shade of brown in your eyes.
Can green and brown eyes make blue?
A lot. A brown eyed dad and a green eyed mom can have a blue eyed child because there are at least two eye color genes. Because of this, it is possible for both green and brown eyed parents to be carriers for blue eyes.
Is brown eyes genotype or phenotype?
Eye color, hair color, and blood type are all phenotypes. You may have a brown-eye phenotype, and your eyes will, therefore, be brown; a brown-hair phenotype and your hair will be brown, or an A blood type phenotype and your blood type will be A.
How do 2 brown eyes make blue?
If both of you have brown eyes, then there is generally a 25% chance that the baby will have blue eyes if both of you carry the recessive blue-eye gene. But if only one of you has a recessive blue-eye gene, and the other has two brown, dominant genes, then there is a less than 1% chance of the baby having blue eyes.
What are the chances of a brown eyed child having blue eyes?
If the brown-eyed parent has Bb, then it’s 50/50. The parent has a 50% chance of passing the recessive gene to the child has a 50% of having blue eyes. If the brown-eyed parent has BB, the likelihood of the child having blue eyes is 0%.
What is the genotype of a child with both brown eyes?
Since both parents are brown-eyed their genotypes would either be CT and CT, TT and TT, or CT and TT Conclusion: If both brown-eyed parents are both heterozygous CT there would be a 25% chance that their child would inherit the CC gene and have blue eyes.
Why do I have brown eyes but my dad has blue eyes?
Your father has two genes for eye colour. If they are both for Brown eyes, then you and your siblings will all have brown eyes. If your father has a brown and a blue gene, he will have brown eyes, but you and your siblings can have either blue or brown eyes.
Are brown eyes dominant or recessive?
Firstly Brown eyes are dominant and blue eyes recessive. Your father has two genes for eye colour. If they are both for Brown eyes, then you and your siblings will all have brown eyes. If your father has a brown and a blue gene, he will have brown eyes, but you and your siblings can have either blue or brown eyes.