n mice coloring is determined by three alleles of the agouti gene.  AA, codes for agouti coloring, AT codes for black with tan belly, and AB codes for all black.  The dominance order is AA>AT>AB. What proportion of offspring are expected to be black with a tan belly from the following cross  ABAT x AAAT?     1/8     none     3/4     1/4     1/2

If two individuals are crossed (RrYy x RrYy), what percentage of their offspring will display the R_yy phenotype?  (the _ could be either R or r, it would not affect the phenotype).

What cross will result in a ratio of 3 dominant phenotype offspring for every 1 recessive offspring?    What cross will result in a 1:2:1 genotype ratio in the offspring?    What cross will result in all homozygous recessive offspring?

Using the following information perform following crosses using the forked line and predict all possible phenotypes types of the offspring. List the number and description of the phenotypes of the offspring. 1. aa BB Cc Dd Ee X aa bb Cc Dd EE 2. Ff Rr Gg dd Bb X Ff RR Gg Dd Bb 3. Dd gg JJ bb Hh Ee X DD GG Jj Bb Hh Ee

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

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. What is the probability of having a male chocolate kitten? Select one: a. 0.50 b. 0.25 c. 0.13 d. 0.06

In domestic chickens, feather color is inherited as an incompletely dominant trait.  Feather color is inherited as:  BB= Black          Bb= Speckled              bb= White What are the predicted phenotypes and their frequencies for each of the following crosses?  A. BB rooster x white hen         Black         ___________                 Speckled ___________ White       ___________   B. Speckled rooster x speckled hen         Black         ___________  Speckled ___________ White       ___________     C. Speckled rooster x white hen         Black         ___________  Speckled ___________ White       ___________

In a dihybrid cross for which the parental cross is A/A;B/Bx a/a;b/b, what proportion of F2 offspring will be heterozygous for both genes? Assume independent assortment. 1/2 1/4 3/4 All are heterozygotes. None are heterozygotes.

The genes for red (RR) and white (rr) flowers have incomplete dominance. What are the percentages and color for the offspring of the cross Rr X Rr?

Given the following parental cross: GgAattHhFfYY x GgAaTtHhffyy What would be the probability of have an individual that was homozygous recessive for each trait? Assume independent assortment. O 1/256 O 1/4096 O 1/128 O 1/2048 O 1/512 O 1/64 O 1/1024