What is the phenotype for BB if B is brown eyes and B is blue eyes?

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
B	RB (red)	BW (blue)
W	RW (red)	WW (white)

Which type of genotype would result in having blue eyes if B is dominant 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.

What is the probability of the offspring having brown eyes dominant if the father has the BB genotype and the mother has the BB genotype?

50\%
If a mother and father are both brown eyed with heterozygous genotype Bb, then they each have probability of 50\% of passing on the dominant allele B and a probability of 50\% of passing on the recessive allele b.

Which allele B or B is for brown eyes?

The way geneticists represent these two different versions of this eye color gene are B for brown and b for blue (the capital letter is always the dominant, the lowercase, the recessive). So you will have brown eyes with either BB or Bb and blue eyes with bb.

What happens if BB mates with BB?

If the female parent has the genotype BB, all of the offspring will have brown bodies (Figure 9, Outcome 1). If the female parent has the genotype Bb, 50\% of the offspring will have brown bodies and 50\% of the offspring will have black bodies (Figure 9, Outcome 2).

What is BB Phenotype?

The physical appearance of the genotype is called the phenotype. For example, children with the genotypes ‘BB’ and ‘Bb’ have brown-eye phenotypes, whereas a child with two blue-eye alleles and the genotype ‘bb’ has blue eyes and a blue-eye phenotype.

Are brown eyes phenotype or genotype?

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.

What is the probability of the offspring having brown eyes?

Each child has a 25\% chance of having brown eyes and a 75\% chance of having blue eyes. This is simplified since the other eye color genes (like those that influence green eyes) are being ignored.

What is the probability of a resulting offspring of being brown?

The odds of having brown fur, given the parental genotypes, is 100\% because all children will receive a dominant allele for brown fur (B) from the first parent.

How dominant are brown eyes?

The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.