Question

The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is test crossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

Options

• 25 AB, 25 ab, 25 Ab, 25 aB

• 10 AB, 10 ab

• 45 AB, 45 ab

• 45 AB, 45 ab, 5 Ab, 5aB

Answer 1

10 AB, 10 ab