What is the genotype of a brown-eyed individual who marries a blue-eyed individual and produces a first offspring that is blue-eyed?
1. 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 | W | |
|---|---|---|
| W | RW (red) | WW (white) |
What is the phenotype of the brown-eyed father?
Your genotype codes for your phenotype — the trait we can actually see. For example, if the blue-eyed parent passed down a blue allele, and the brown-eyed parent passed down a brown allele, the child’s genotype will be blue-brown, and his or her phenotype will be brown.
What is the probability that this couple will have a blue-eyed child?
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 is genotype of black chicken?
The black color is represented by allele B and white color by allele W , as neither of these allele can dominate over the other. On mating a black chicken with white chicken, the offsprings will inherit B allele from black parent and W allele from white parent. The genotype of offsprings will be BW.
What is the genotype for brown eyes?
Of these three genotypes, only bb, the homozygous recessive genotype, will produce a phenotype of blue eyes. The heterozygous genotype and the homozygous dominant genotype both will produce brown eyes, though only the heterozygous genotype can pass on the gene for blue eyes.
Can two blue eyes make green?
First, the answer is yes to both questions: two blue-eyed parents can produce green or brown-eyed children. Eye color is not the simple decision between the brown (or green) and blue versions of a single gene.
What is Erminette?
: rabbit fur processed to simulate ermine.
What happens when one parent has brown eyes and the other blue?
If one of the grandparents has blue eyes, the odds of having a baby with blue eyes increases slightly. If one parent has brown eyes and the other has blue eyes, the chances of having a brown-eyed or blue-eyed baby are roughly even.