The recessive A and B genes are located on the same chromosome, and a testcross is set up with a double heterozygous individual to determine the relative distance between these two genes. The test cross results in 396 offspring that are phenotypically wild type; 400 offspring that express both recessive traits; 96 offspring that express the recessive trait for A gene but are wild type for B; and 104 offspring that express the recessive trait for B gene but are wild type for A. What is the relative distance of A and B genes on the chromosome in centimorgan?

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.