What happens when there are two dominant genes?
If both alleles are dominant, it is called codominance?. The resulting characteristic is due to both alleles being expressed equally. An example of this is the blood group AB which is the result of codominance of the A and B dominant alleles.
When two dominant versions of a trait are expressed in an offspring?
Codominance Codominance is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent. If the alleles are different, the dominant allele usually will be expressed, while the effect of the other allele, called recessive, is masked.
What is a gene with two dominant alleles that are expressed at the same time?
Closely related to incomplete dominance is codominance, in which both alleles are simultaneously expressed in the heterozygote.
What is the most correct term for two dominant traits that are observable phenotypically at the same time in one offspring?
In COdominance, the “recessive” & “dominant” traits appear together in the phenotype of hybrid organisms. With codominance, a cross between organisms with two different phenotypes produces offspring with a third phenotype in which both of the parental traits appear together.
Do you need two recessive alleles to receive a phenotype?
In order to see the receive phenotype you need 2 recessive alleles. -All the offspring will be heterozygous and express only the dominant trait. For Incomplete Dominancance: if the dominant trait was for red flowers and the recessive trait was white flowers the genotypes and phenotypes would be…
What happens if you have two dominant or two recessive genes?
Different versions of a given gene are called “alleles.” If the only alleles available for a given trait are T or t, then TT, Tt, and tT all result in the dominant gene, T, being expressed; and the recessive trait, t, only gets expressed in the gene combination tt. That’s what everybody else said.
Can a trait have more than two alleles?
But, the gene for a given trait is NOT ALWAYS BINARY; there can be more than two alleles for some traits, that is, there may be more than two possible phenotypic expressions. For instance, the gene for “eye color” is not just “brown” or “blue;” there are green eyes, and hazel eyes, and grey eyes, and so on.
Is it recessive for animals to have five fingers?
But sometimes something goes wrong and an animal ends up with extra or missing digits. And surprisingly, having five fingers in these cases is usually a recessive trait. When people or animals are born with extra fingers this typically dominant trait is called polydactyly.