When will a dominant trait be expressed?

Answer 1

In genetics, a trait that will appear in the offspring if one of the parents contributes it. * In humans, dark hair is a dominant trait; if one parent contributes a http://www.answers.com/topic/gene for dark hair and the other contributes a gene for light hair, the child will have dark hair.

Answer 2

Dominant alleles are observed when they exist. Recessive alleles are observed only when they exist exclusively. i.e. if an animal has the genotype Tt (T=dominant, t=recessive), the dominant allele will be observed. if the animal has the genotype tt, the recessive allele will be observed because the dominant allele is not present. if the animal has the allele TT, the dominant allele will be present

Answer 3

Depending on the genotype your answer will vary...

with a genotype for example of Gg (G-green, g-white) you will have a green plant. If the genotype is GG then you will also have gree. having gg will give you white

Answer 4

There are two ways that both dominant and recessive alleles are expressed.

1. Incomplete Dominance

This is when two organisms produce an offspring that has a blend of the parental traits. For example, when a red flower (RR) and a white flower (WW) end up producing a pink flower (RW), the pink is a blend of the red and white. The trait is in-between the two parental traits and neither parental trait complete dominates over the other, so it's called incomplete dominance.

2. Codominance

For codominance, the offspring also shows a different trait from the parents. A blending of the dominant and recessive traits produce a trait that is somewhere in the middle. For example, when a red flower (RR) and a white flower (WW) end up producing a red and white spotted flower (RW), both of the parental traits appear in the red and white spots.

How are incomplete dominance and codominance different?

For incomplete dominance, the two parental traits blend together "like mixing two colors of paint" to form a new trait in the offspring. For codominance, the two parental traits are still distinct in the offspring's new trait. The offspring shows distinct signs of both the mother's trait and the father's trait, like "2 colors that appear together without blending within each other."

Answer 5

a dominant allele is expressed when its dominant over a recessive trait, for example, DD x dd, the dominant allele is D.

Answer 6

A dominant allele can express itself in both homozygous or heterozygous conditions in the subsequent generations.

Answer 7

hehehe!