In a dihybrid test cross of 1000 offspring, 748 are tall and hairy, 6 tall and smooth, 4 short and hairy and 242 short and smooth. What explains this ratio?
Correct answer D. Linkage and crossing over
Explanation
Parental types dominate and recombinants are rare, showing the two genes are linked on one chromosome, with crossing over producing the few recombinants.
Answer checked How we write and check questions
Discussion