Essential Genetics 6th Edition by Daniel Hartl

تمرين 6

Semisterile tomato plants heterozygous for a reciprocal translocation between chromosomes 5 and 11 were crossed with chromosomally normal plants homozygous for the recessive mutation broad leaf on chromosome 11. When semisterile
plants were crossed with the plants of broad-leaf parental type, the following phenotypes were found in the backcross progeny:

(a) What is the recombination frequency between the broad-leaf gene and the translocation breakpoint in chromosome 11?
(b) What ratio of phenotypes in the backcross progeny would have been expected if the broad-leaf gene had not been on the chromosome involved in the translocation?