Question

Anita thinks that she has heterozygous alleles for red hair. If she is correct, which of these diagrams best illustrates Anita’s alleles for red hair?
A. R ----> <------ R

B. R ----> <------ r

C. R ---->

D. r ----> <------ r

Answer 1

B. Because heterogeneous is two different letters basically.  

Answer 2

Answer: The correct answer is- B) Rr

Heterozygous  genotype means both the alleles ( alternative form of a gene) are different ( such as Tt for tall height).

Out of the two alleles in the heterozygous state, one with capital letter depicts dominant allele and the other with small letter depicts recessive allele, which is masked by the presence of dominant allele in the genotype.

As per the question, Anita thinks that she has heterozygous allele for red hair.

This condition is only fulfilled by option B) Rr ( heterozygous genotype), which contains two different alleles that is R and r.