A field experiment is conducted to test for a heterozygote advantage in the survival of a mustard plant.When heterozygotes for the A locus are first crossed,the yield is 200 AA,400 Aa,and 200 aa ( i.e. ,a ratio of 1:2:1).In trial 1,35 AA,44 Aa,and 23 aa plants survive.In trial 2,25 AA,68 Aa,and 21 aa plants survive.In trial 3,27 AA,48 Aa,and 23 aa plants.Based on these results,which statement is true?
A) Only trial 1 shows heterozygote advantage.
B) Only trial 2 shows heterozygote advantage.
C) Both trials 1 and 2 show heterozygote advantage.
D) Only trial 3 shows heterozygote advantage.
E) No trial shows heterozygote advantage.

Question

Quizplus · Accepted Answer

Trial 2 shows a higher survival rate for heterozygotes (Aa) compared to both homozygotes (AA and aa), indicating a heterozygote advantage.

A Field Experiment Is Conducted to Test for a Heterozygote