What is the difference between incomplete dominance and codominance? The dominant allele completely masks the recessive allele. In codominant traits both alleles are expressed, while in incompletely dominant traits the alleles mix to create a 3rd variation of the trait. In codominance the traits are mixed, in incomplete domiannce the traits are both expressed.

Incomplete Dominance and Codominance So far, we have been studying the inheritance of genes that show complete dominance. In other words, one allele is completely dominant over another. In some cases, such as incomplete dominance and codominance, one allele is not completely dominant over another or the alleles affect the phenotype equally. Examples of incomplete dominance include feather color in parrots (C*C* = blue, C'C = yellow, C*Cf = green) and hair texture in humans CC = curly; C'C' = straight; CC' = wavy Practice Problem 3: За. If a straight-haired man marries a curly haired woman, what are the predicted genotypes and phenotypes of their children? If a parrot with yellow feathers is crossed with a parrot with green feathers, what are the predicted genotypes and phenotypes of their offspring? 3b.

For n = number of genes segregating, how many different phenotypes and genotypes are observed in the F2 generation? Assume complete dominance at each gene. 2" phenotypes and 3" genotypes 3" phenotypes and 2" genotypes n2 phenotypes and n° genotypes n3 phenotypes and n2 genotypes

In the red backed vole (a small mouse-like mammal) there are two traits under investigation.  The first trait is a distinct tuft of long hairs at the tip of the tail with a tufted tail being recessive to non-tufted tail.  The letter T is used to represent the tail tuft gene.  The second trait is a patch of red fur on the head which is known to be recessive to the more common lack of a red patch.  The letter R is used to represent this trait.  A female to be used in the cross was drawn from a pure breeding line that consistently has both the red patch on the head and a tufted tail.  The female is to be crossed with a male from a highly variable wild population.  The male used had no red head patch and a normal (untufted) tail.  The results were as follows:  7 red head patch with tail tuft, 8 no red head patch with tail tuft, 8 red head patch without tail tuft, 8 no red head patch without tail tuft.  What would the results be if the male was crossed with a female that was known to be…

What would be the phenotypic and genotypic ratio in F2 generation of the offspring of two parents? One parent is homozygously dominant for height and the other parent is recessive or height.

In a poultry breed, chickens can have black, blue or white feathers. The different feather colors are determined by interactions between genes at two loci. One locus determines the type of pigment produced by the skin cells: a dominant allele B encodes black pigment, whereas a recessive allele b encodes blue pigment. Alleles at a second locus affect the deposition of the pigment onto the feathers. Allele E allows dark pigment (black or blue) to be deposited, whereas the homozygous recessive (ee) condition prevents the deposition of dark pigment, causing the feathers to be white. In each of the following 3 crosses give the genotypes and phenotypes of the parents and their offspring: a) Two black birds that are both heterozygous for traits B and E b) Two blue birds that produce 6 blue and 2 white chicks c) A black bird that is homozygous dominant for both traits and a white bird that is homozygous recessive for both traits