Gene Interaction For Coat Color

Related BrainMass Solutions

• Monofactorial cross with incomplete dominance.

  What type of interaction between genes is this? This is known as MONOFACTORIAL (Single gene) CROSS with incomplete dominance. What proportion of sperm from the F1 is expected to carry the allele for brown coat color?

• Determining the mode of inheritance of genotypes

  gene 1 (R,r) encodes for red such that RR or Rr= red rr= no color gene 2 (S,s) encodes for sandy such that Ss or Ss= sandy ss= no color Now we must look at the relationship between these two genes that contributes coat color.

• Dihybrid cross involving dog coat color

  All the genotypes for each cross can be found in the attached file. Explanation of how to decipher allele and gene relations in dog coat color example with Punnett squares to explain all test crosses.

• Practice problems

  You have discovered a new orange body color gene on the X chromosome of Drosophila similar to the gene that confers orange coat color in cats.

• Genetic Questions

  Let us assume that Brown coat color---------BB Tan coat color-----------bb Brown coat color is dominant to tan coat colour, so even in the presence of single allele (B) brown color can express.

• Punnett Squares and Genetics

  B = Black fur B= brown fur A separate gene E encode for color deposition in the coat, and ee genotype prevents color deposition in the coat resulting in golden phenotype.

• Inheritance pattern problems

  : A-B- (gray); A-bb (yellow); aaB- (black); aabb (cream) A third gene pair on a separate autosome determines whether any color will be produced.

• Mendelian Inheritance

  In Labrador retriever dogs, the dominant gene B determines black coat color and bb produces brown. A separate gene E, however, shows dominant epistasis over the B and b alleles, resulting in a "golden" coat color.

• Punnett squares

  In guinea pigs, black coat color (B) is dominant over white coat color (b). When a true breeding black guinea pig is crossed to a true breeding white guinea pig, what is the probability that their progeny will be black? Explain. b.