In humans, the allele n causes an abnormal shape of the patella in the knee (n is the normal allele). a separate gene is concerned with finger length the allele b causes abnormally short fingers, whereas b gives normal length. a study focused on people who have abnormal patellae and short fingers (n/n. b/b in genotype), having inherited the n allele from one parent and the b allele from the other parent. these n/n. b/b people mated with normal spouses producing 40 progeny, classified as follows:
normal 3
abnormal knees and fingers 2
abnormal knees only 17
abnormal fingers only 18
what ratios of parental and recombinant phenotypes would you expect if these genes are linked? unlinked?
use a chi-square test to check if the genes are linked. if they are, provide a map distance for these two genes.