The following is known about the inheritance of size and fur color in Holland lop rabbits:
•Crosses between large individuals only produce large individuals.
•Crosses between dwarf individuals produce both large and dwarf rabbits in a ratio of 1:2.Such crosses also produce some very small kits (baby rabbits) that generally die within a few days.
•Crosses between brown rabbits only produce brown kits.
•Some crosses between black rabbits produce only black kits,whereas others produce both black and brown kits.
•The size and fur-color phenotypes segregate independently.
-What are the expected phenotypes in the F₁ of a cross between a dwarf rabbit that breeds true for brown fur color and a large rabbit that breeds true for black fur color?

Question

Quizplus · Accepted Answer

The dwarf trait is likely due to a heterozygous genotype with a lethal homozygous recessive allele, while the large trait is homozygous dominant. The brown fur is recessive, and black is dominant. Crossing a true-breeding brown dwarf (homozygous recessive for color and heterozygous for size) with a true-breeding black large (homozygous dominant for both traits) will produce black offspring that are heterozygous for both traits, resulting in black dwarf and black large phenotypes.

The Following Is Known About the Inheritance of Size and Fur