Are green eyes a recessive or codominant trait?

Answer 1

eye colour genes cannot be co-dominant, because codominance means the organisms expresses both phenotypes. it's like you'll be seeing two colours - one eye blue and the other one yellow??

it is more plausible that it is an incompletely dominant trait, but however, it is proven that there is a gene for green eyes, so it can only be a recssive trait. it is recessive to the gene for brown eyes.

Answer 2

Here are some clues where you can figure it out for yourself.

RECESSIVE:
an allele that causes a phenotype (visible or detectable characteristic) that is only seen in a homozygous genotype (an organism that has two copies of the same allele) and never in a heterozygous genotype. Every person has two copies of every gene, one from mother and one from father. If a genetic trait is recessive, a person needs to inherit two copies of the gene for the trait to be expressed. Thus, both parents have to be carriers of a recessive trait in order for a child to express that trait. If both parents are carriers, there is a 25% chance with each child to show the recessive trait.

The term "recessive gene" is part of the laws of Mendelian inheritance created by Gregor Mendel. Examples of recessive genes in Mendel's famous pea plant experiments include those that determine the color and shape of seed pods, and plant height.

CO-DOMINANCE, neither phenotype is dominant. Instead, the individual expresses both phenotypes. The most important example is in Landsteiner blood types. The gene for blood types has three alleles: A, B, and i. i causes O type and is recessive to both A and B. When a person has both A and B, they have type AB blood.

Another example involves cattle. If a homozygous bull and homozygous cow mate (one being red and the other white), then the calves produced will be roan-colored, with a mix of red and white hairs.

Example Punnett square for a father with A and i, and a mother with B and i:

A i
B AB B
i A O

Amongst the very few co-dominant genetic diseases in humans, one relatively common one is A1AD, in which the genotypes Pi00, PiZ0, PiZZ, and PiSZ all have their more-or-less characteristic clinical representations.

Most molecular markers are considered to be co-dominant.

Answer 3

Recessive

Answer 4

Green colour doesn't come from a particular green pigment, but from the mixes of incomplete expression of yellow pigments in our eyes. Lack of pigmentation means light blue, which currently in our society is recessive only because there's more people exhibiting brown eyes than blue eyes. Green is just half way between.

Answer 5

try this website
http://museum.thetech.org/ugenetics/eyeCalc/eyecalculator.html