Trihybrid Testcross Quiz 2009 Answer Key PDF

Preview

Summary

This is a lab quiz. The format will be the same only the numbers will be different....

Description

Name ______________________ Lab period ___________________ BIOL 3216 – Genetics Trihybrid Testcross Quiz The plant genes A, B, and C are all linked on the same chromosome. A trihybrid plant AaBbCc is crossed with a tester aabbcc to produce 1000 offspring of the following types:

A. Which gene, A, B, or C is in the middle? A B. Diagram the arrangement of the dominant and recessive alleles of the three gene pairs in the trihybrid.

C. Draw a map of the chromosome, showing the correct order of the three genes and the distances between them.

D. Calculate the interference indicated by the data. EDCO = 0.06 x 0.11 x 1000 = 6.6 Interference = 1 – (10/6.6) = − 0.52 E. Based on the interference, does a crossover in this region tend to stimulate or inhibit additional crossovers in the region? Negative interference indicates that a crossover stimulates additional crossovers....