Question: How many total phenotypes are possible in a Codominance cross?

How do you determine the number of phenotypes?

The number of different genotypes is 3 n where n = number of genes. For simple dominant–recessive relations, the number of different phenotypes is 2 n , where n = number of genes.

How many phenotypes are possible?

A fetus receives one of these three alleles from each of its parents. This produces four possible phenotypes (blood types) and six possible genotypes.

How many different phenotypes are possible?

There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes.

When a cross between a red and white flower results in an offspring flower that has patches of both red and white we describe this phenomenon as?

Incomplete Dominance and Codominance Instead of being uniformly pink, a flower with red and white alleles that show codominance will have patches of red and patches of white. As with incomplete dominance, the F2 generation from heterozygous plants will have a ratio of 1:2:1 of red, spotted, and white flowers.

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What phenotypes would you expect from a cross between a red Bull and a white cow?

In shorthorn cattle, when a red bull (RR) is crossed with a white cow (WW), all the offspring are roan—a spotted, red and white or milky red color.

Which two colors of horse would you want to breed if you wanted to produce the maximum numbers of Palominos in the shortest amount of time?

If you wanted to produce the maximum amount of palomino colored horses, you should breed a white and a brown horse together because no matter what the genetic combination is, the offspring will be guaranteed to have the palomino coloring.

What is the ratio of codominance?

In codominance, neither phenotype is completely dominant. This phenomenon is commonly seen in ABO blood group system. When any other blood group (A, B or AB) is crossed with O blood group, then the phenotypic ratio is obtained as 1:1. Both the genes are equally expressed.

How does codominance occur?

Codominance occurs when both alleles show dominance, as in the case of the AB blood type (IA IB) in humans. … In these cases, individuals with the same allele combination can produce different degrees of a phenotype in different individuals.

What are the examples of codominance?

Examples of Codominance:

  • AB Blood Type. People with this blood type have A and B proteins at the same time. …
  • Sickle-Cell Anemia. Sickle cell anemia is a disease where red blood cells become thin and stretched out. …
  • Horse color. The roan coat color of a horse is due to codominance. …
  • Flower colors.
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