What if two heterozygous people have kids what is the expected ratio of brown eyes to blue-eyed kids?

What if two heterozygous people have kids what is the expected ratio of brown eyes to blue-eyed kids?

1. If B is the allele for brown eyes and b is blue, the genotype of the blue-eyed man is bb. If he were heterozygous, we’d expect to see a 1:1 ratio of brown- and blue-eyed children (because his wife is homozygous recessive, bb).

Are the parents homozygous or heterozygous for their brown eye trait?

The Parents are heterozygous for both hair and eye color (BbEe: Brown hair and Brown Eyes).

Can 2 blue eyed people have a brown-eyed child?

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 two people with brown eyes have a blue eyed baby?

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.

Are blue eyes heterozygous or homozygous?

Being homozygous for a particular gene means you inherited two identical versions. It’s the opposite of a heterozygous genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.

What is heterozygous vs homozygous?

Heterozygous refers to having inherited different forms of a particular gene from each parent. A heterozygous genotype stands in contrast to a homozygous genotype, where an individual inherits identical forms of a particular gene from each parent.

Can 2 blue eyed parents produce green eyes?

First, the answer is yes to both questions: two blue-eyed parents can produce green or brown-eyed children. However, because many genes are required to make each of the yellow and black pigments, there is a way called genetic compensation to get brown or green eyes from blue-eyed parents.

Can a blue eyed and brown eyed parents have a blue eyed child?

If both parents have blue eyes, the children will have blue eyes. If both parents have brown eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive.

Do two blue eyed parents always have a blue eyed child?

The laws of genetics state that eye color is inherited as follows: If both parents have blue eyes, the children will have blue eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive.

Why do we get brown eyes with heterozygous genotypes?

For instance, it could mean you have two alleles for the gene that causes brown eyes. Some alleles are dominant, while others are recessive. The dominant allele is expressed more strongly, so it masks the recessive allele. However, in a homozygous genotype, this interaction doesn’t occur.

Can a blue eyed parent have a brown eyed child?

A common myth is that parents who both have blue eyes cannot have a child with brown eyes because of dominant and recessive genes, but in reality genetic variations sometimes produce unexpected results. Though there is a less than 1% chance of blue-eyed parents having a brown-eyed child, it is not out of the question.

Which is the most common eye color in humans?

The most common eye color is brown, while the rarest is green, and shades of hazel, gray and blue usually lie somewhere in between. Brown eyes are an indication of the presence of a dominant gene. This gene is responsible for the pigmentation in the eye, and in its presence, more pigment is produced, thus the brown eyes.

How are blue eyes passed down from generation to generation?

The recessive gene causes less pigment to be produced in the eye, and blue eyes are an indication of the least amount of pigment being produced. The blue-eyed gene can be passed down from one generation to the next without manifesting itself, waiting for the ‘best’ time to appear, which is when two carriers of the gene have children.

What causes a person to have blue eyes?

The gene responsible for blue eyes, however, is actually a recessive gene. This means that in the presence of a dominant gene, it will be trampled over. The recessive gene causes less pigment to be produced in the eye, and blue eyes are an indication of the least amount of pigment being produced.