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2021-05-15

What is it called when both alleles are expressed equally in the phenotype?

What is it called when both alleles are expressed equally in the phenotype?

Codominance. A variation on incomplete dominance is codominance, in which both alleles for the same characteristic are simultaneously expressed in the heterozygote. Homozygotes (IAIA and IBIB) express either the A or the B phenotype, and heterozygotes (IAIB) express both phenotypes equally.

Are both alleles expressed?

In most cases, both alleles of a gene are transcribed; this is known as bi-allelic expression. However, a minority of genes show monoallelic expression. In these cases, only one allele of a gene is expressed.

What is it called when someone has two alleles for the same trait?

If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous.

What is it called when two genes are in a cell and one gene’s phenotype is expressed and one is not?

When two genes are in a cell and one of the gene’s phenotype is expressed and the other is not is called a heterozygous trait. The trait that is not expressed is the dominant allele gene.

Which is an example of a phenotype?

Examples of phenotypes include height, wing length, and hair color. Phenotypes also include observable characteristics that can be measured in the laboratory, such as levels of hormones or blood cells.

What percentage of the offspring is a homozygote if both parents are heterozygotes?

75%

How do you find the probability of an offspring?

Count the total number of boxes in your Punnett Square. This gives you the total number of predicted offspring. Divide the (number of occurrences of the phenotype) by (the total number of offspring). Multiply the number from step 4 by 100 to get your percent.

How many genotypes are possible for the offspring?

With three alleles 1, 2, 3 there are six possible genotypes: 11, 12, 13, 22, 23, 33. First we must appreciate that genes do not act in isolation. The genome in which a genotype is found can affect the expression of that genotype, and the environment can affect the phenotype.

Which is an example of a heterozygous individual?

There are different versions of genes. If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.