Question

A female rabbit of phenotype c’ is crossed to a male rabbit with c ch. The F1 is comprised of five rabbits with a c’ phenotype, two with c ch phenotype, and three with c phenotype. Of the phenotypically c rabbits, two are females and are backcrossed to their father. This cross produces only rabbits with c ch phenotype. These results suggest that:A) c could be dominant or recessive to c’B) c is dominant to c’, but recessive to c chC) c is dominant to c ch, but recessive to c’D) c is dominant to both c’ and c chE) c is recessive to both c’ and c ch

Answer 1

Answer:

Option E, c is recessive to both c’ and c ch

Explanation:

As it is given in the question that when phenotypically c female rabbits are crossed with father with phenotype cch , the offspring produced have only cch phenotype which means that allele cch is dominant over allele “c”

Now in the F1 cross, when a female rabbit of phenotype c’ is crossed with cch male rabbit, then also c’ is expressed over “c” allele.  

Hence, c is recessive to both c’ and cch allele