2. Next, use the Hardy-Weinberg equation (p + 2pq + q = 1) to calculate the expected frequencies of genotypes C°C°, C°C, and C'C" for a population in Hardy-Weinberg equilibrium.

Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter12: Mendel, Genes, And Inheritance
Section: Chapter Questions
Problem 2ITD
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Answer the number 2 Problem 

Determining if a plant population is Evolving
One way to test whether evolution is occurring in a population is to compare
the observed genotype frequencies at a locus with those expected for a non-
evolving population based on the Hardy-Weinberg equation. In this exercise,
you'll test whether a pea plant population is evolving at a locus with two
alleles, Cand C, that affect chlorophyll production and hence leaf color.
Experimental Set-up:
Students planted soybean seeds and then counted the number of seedlings
of each genotype at Day 7 and again at Day 21. Seedlings of each genotype
could be distinguished visually because the C° and C' show incomplete
dominance: C°C seedlings have green leaves, C°C" seedlings have green-
yellow leaves, and C'C' seedlings have yellow leaves.
Number of Seedlings
Time (Days)
Green-Yellow
Yellow
Total
Green
c"c
c'c"
7
52
113
58
222
21
49
108
22
179
Interpret the Data
Transcribed Image Text:Determining if a plant population is Evolving One way to test whether evolution is occurring in a population is to compare the observed genotype frequencies at a locus with those expected for a non- evolving population based on the Hardy-Weinberg equation. In this exercise, you'll test whether a pea plant population is evolving at a locus with two alleles, Cand C, that affect chlorophyll production and hence leaf color. Experimental Set-up: Students planted soybean seeds and then counted the number of seedlings of each genotype at Day 7 and again at Day 21. Seedlings of each genotype could be distinguished visually because the C° and C' show incomplete dominance: C°C seedlings have green leaves, C°C" seedlings have green- yellow leaves, and C'C' seedlings have yellow leaves. Number of Seedlings Time (Days) Green-Yellow Yellow Total Green c"c c'c" 7 52 113 58 222 21 49 108 22 179 Interpret the Data
2. Next, use the Hardy-Weinberg equation (p + 2pq + q = 1) to
calculate the expected frequencies of genotypes C°C , C°C" , and C'C"
for a population in Hardy-Weinberg equilibrium.
Transcribed Image Text:2. Next, use the Hardy-Weinberg equation (p + 2pq + q = 1) to calculate the expected frequencies of genotypes C°C , C°C" , and C'C" for a population in Hardy-Weinberg equilibrium.
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