Question

A new kind of pet is in the market has fur color that is regulated by 5 unlinked genes F, G, H, I and J which are enzymes. Each enzyme converts one compound into a different one. Allele F converts the colorless 1 compound into a red compound. Allele G converts colorless 2 into yellow. Allele H converts colorless 1 into colorless 2. I converts colorless 2 to red. Allele J converts red into yellow. When both the red and yellow compounds are produced animals are orange. What pet fur color does an animal with an FF GG hh II JJ genotype results in pathway 1 and pathway 22 and Pathway 1 red Colorless 1 Colorless 2 - G y ellow Pathway 2 red Colorless 1 Colorless 2 yellow A red and yellow B.colorless 1 and colorless 2 C. yellow and colorless D. Red and colorless

Answer 1

The genotype of the animal is FF GG hh II JJ.

Thus the animal has the proteins F, G, I and J but lacks the protein product H.

For pathway 1 shown in the figure, the animal has only the gene products F, J, and G and lacks H. Thus the organism can produce red and yellow.

For pathway 2 shown in the figure, the animal has genes I and G but lacks H. Thus, this pathway stays inactive altogether.

Hence the organism produces compound yellow from pathway 1 and colorless 1 from pathway 2.