In guinea pigs, black fur (B) is dominant over white fur (b) and rough four ( R ) is domiant over smooth fur ( r ) . A cross between two Guinea pigs hybrid for both traits (BbRr x BbRr) produces some offsprings that have rough, black fur and some that have somooth, black fur. The genotypes of these offsprings illustrate the genetic concept of
A. Intermediate inheritance
B. Multiple alleles
C. Independent assortment
D. Codominance
