A geneticist found that when two platinum-colored foxes are crossed, litters with both platinum and silver-colored offspring are always produced. Over the years, she collected the following data: platinum X platinum 220 platinum foxes and 110 silver foxes Which of the following is the most likely explanation for platinum and silver coat color in foxes?       Silver is homozygous recessive, and platinum can either be homozygous or heterozygous.     Silver is homozygous, platinum is heterozygous, and the platinum allele is lethal when homozygous.     There is epistasis involved.

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Within a mouse population, the black fur allele (B) is dominant to the white fur allele (b) and the short whisker allele (S) is dominant to the long-whisker allele (s). A heterozygous black-furred short-whiskered mouse is crossed with a homozygous white-furred long-whiskered mouse. What percentage of the offspring will be black-furred with long whiskers?

Three different genes determine the coat colour of cats. One of the genes controls the black-based coat colour. There are three alleles for black-based coat colour genes with the following order of dominance: black (B) > chocolate (bch) > cinnamon (bc). Two black cats were crossed. The offspring produced were three black kittens and one chocolate kitten. Which of the following rows identifies the possible genotype(s) of the parents? Select one: a. Parent 1 Parent 2 Bbch Bbch b. Parent 1 Parent 2 Bbch Bbc or Bbch c. Parent 1 Parent 2 Bbc Bbch d. Parent 1 Parent 2 B__ Bbch

If the hybrid parents were mated 100 times, it does not mean that this is the exact distribution of genotypes in those 100 offspring. The likelihood of each genotype being passed on is the same for each offspring. There is just a higher likelihood that offspring with be hybrid when hybrid parents are crossed. Complete the following examples: Brown hair (H) in horses dominates over white hair (h). Cross a pure brown sire with a hybrid brown dam. What are the possible genotypes and phenotypes and their likelihood of appearance? Dam Genotype Sire % chance in offspring Phenotype % chance in offspring

Three different genes determine the coat colour of cats. One of the genes controls the black-based coat colour. There are three alleles for black-based coat colour genes with the following order of dominance: black (B) > chocolate (bch) > cinnamon (bc). Two black cats were crossed. The offspring produced were three black kittens and one chocolate kitten. Which of the following rows identifies the possible genotype(s) of the parents? Select one: a. Parent 1 Parent 2 Bbch Bbch b. Parent 1 Parent 2 Bbch Bbc or Bbch c. Parent 1 Parent 2 Bbc Bbch d. Parent 1 Parent 2 B__ Bbch

In goats, black fur is dominant to red fur. The gene for this trait can be described as Bb. A homozygous black female goat (nanny) is crossed with a heterozygous male (billy). What are the genotypes and phenotypes of nanny and billy?

A fish with red eyes and yellow scales is crossed to a pure-breeding fish with brown eyes and orange scales, resulting in offspring having red eyes and yellow scales (50%) or brown eyes and yellow scales (50%). You cross the red eye/yellow scale offspring together, and the resulting offspring are as follows. How are these traits likely inherited Number of offspring 676-yellow/red 224-red/orange 224-brown/yellow 76-brown/orange

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…