A hair color gene with allele B for black and b for brown pigment determines the hair pigment in many mammals, e.g., in rodents and doe. Another gene, which is responsible for the pigment deposition, determines whether the hair is actually pigmented or not: D allele of this gene allows pigment deposition, while d allele does not support pigment deposition into the hair shaft. A dd genotype of these animals will have white hair regardless of any B and b alleles expressed. This is an example of which of the following?

MCQs on various topics in genetics, focusing on DNA, genes, and chromosomes. Topics include: crosses, mitosis and meiosis, protein synthesis, linkage, chromosome mapping, anomalies and disorders, and genetics technology and tools.