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What is the probability that the offspring will have blue eyes?
If both parents are heterozygous for eye color, the probability that a child will have blue eyes is 14 or 0.25 , for each child, because each birth is an independent event.
What are the odds of two blue eyed parents having a child with brown eyes?
The results are a 9 in 16 chance for brown and a 7 in 16 chance for blue. This assumes that any of four combinations of the two genes is possible. This is true for genes that are far apart or on different chromosomes. This does not tend to be true if genes are really close together like OCA2 and HERC2.
How can parents with brown eyes produce an offspring 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 is a recessive blue eye gene?
Blue will always be recessive. If both parents have a blue allele, it is likely that the child will have blue eyes. However, if one parent has green eyes and the other blue, your child will most likely have green eyes, as green is dominant over blue.
What are dominant genes and recessive genes?
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
Are blue eyes recessive?
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.
Are brown eyes recessive?
Brown eye color is a dominant trait and blue eye color is a recessive trait. Green eye color is a mix of both. Green is recessive to brown but dominant to blue.
Are blue or brown eyes the dominant gene?
Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes. The genes control the amount of melanin inside specialized cells of the iris.
What are recessive and dominant genes?
The most common interaction between alleles is a dominant/recessive relationship. An allele of a gene is said to be dominant when it effectively overrules the other (recessive) allele. Eye colour and blood groups are both examples of dominant/recessive gene relationships.