Single Gene Inheritance Patterns : Incomplete Dom 4 certain species of hamsters , fur color is inherited by alleles that show incomplete dominance , Brown fur ( B) incompletely dominant to white fur (b ). Heterozygotes ( Bb) will grow a tan colored fur a Punnett square showing a cross between a homozygous brown fur and a homozygous white fur . What are the genotypes of the offspring? What are their phenotypes ?

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.