BIOLOGY DUAL ENROLLMENT VERSION
12th Edition
ISBN: 9780136681311
Author: Urry
Publisher: PEARSON
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Chapter 23.2, Problem 3CC
WHAT IF? → A locus that affects susceptibility to a degener-ative bram discasc has two alleles, V and v. In a population, 16 people have genotype VV, 92 have geootype Vv, and 12 have genotype vv. Is this population evolving? Explain.
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In flies, long wings are a dominant trait, and short wings are a recessive trait. Medium wings are the heterozygous
trait. Based on this information, if a homozygous long-winged fly is crossed with another a heterozygous'fly, their
offspring will have which percentages for long, medium, and short wings? Assume random chromosome segregation.
17)
A)
25% long, 75% medium, 0% short
B)
50% long, 25% medium, 25% short
50% long, 50% medium, 0% short
D)
100% medium, 0% long, 0% short
Phenotype to Population
1. Describe how the phenotype of individuals with sickle-cell disease influences how
common the Hbs allele is in the population: Do individuals with sickle cell disease
typically have many offspring? What effect does the fact that individuals with
sickle-cell disease do not produce many offspring have on the frequency of the Hbs
allele in the population over time? Given this, do you expect the Hbs allele to be
common or rare in populations?
Chapter 10: Dihybrid Cross Worksheet
In rabbits, gray hair is dominant to white hair. Also in rabbits, black eyes are dominant to red eyes. These letters
represent the genotypes of the rabbits:
GG = gray hair
Gg = gray hair
gg = white hair
BB = black eyes
Bb = black eyes
bb = red eyes
1. What are the phenotypes (descriptions) of rabbits that have the following genotypes?
Ggbb
ggbb
GgBb
2. A male rabbit with the genotype GGbb is crossed with a female rabbit with the genotype ggBb the square is
set up below. Fill it out and determine the phenotypes and proportions in the offspring.
Gb
Gb
How many out of 16 have gray fur
and black eyes?
gB
How many out of 16 have gray fur and red
eyes?
gB
How many out of 16 have white fur
and black eyes?
gb
How many out of 16 have white fur
and red eyes
gb
3. A male rabbit with the genotype GgBb is crossed with a female rabbit with the genotype GgBb
The square is set up below. Fill it out and determine the phenotypes and proportions of offspring
GB
Gb
gB…
Chapter 23 Solutions
BIOLOGY DUAL ENROLLMENT VERSION
Ch. 23.1 - Explain why genetic Variation within a population...Ch. 23.1 - Ot all the mutations that occur in a population,...Ch. 23.1 - Prob. 3CCCh. 23.2 - A population has 700 individuals, 85 of genotype...Ch. 23.2 - Prob. 2CCCh. 23.2 - WHAT IF? A locus that affects susceptibility to a...Ch. 23.3 - In what sense is natural selection more...Ch. 23.3 - Distinguish genetic draft from gene flow in terms...Ch. 23.3 - WH AT IF? Suppose two plant populations exchange...Ch. 23.4 - What is the relative fitness of a sterile mule?...
Ch. 23.4 - Explain why natural selection is the only...Ch. 23.4 - Prob. 3CCCh. 23 - Typically. most of the nucleotide variabillity...Ch. 23 - Is it circular reasoning to calculate p ond q from...Ch. 23 - Would two small, geographically isolated...Ch. 23 - How might secondary sex characteristics in males...Ch. 23 - Natural selection changes allele frequencies...Ch. 23 - Prob. 2TYUCh. 23 - Prob. 3TYUCh. 23 - There are 25 individuals in population 1, all with...Ch. 23 - Prob. 5TYUCh. 23 - EVOLUTION CONNECTION Using at least two examples,...Ch. 23 - SCIENTIFIC INQUIRY INTERPRET THE DATA Researchers...Ch. 23 - Prob. 8TYUCh. 23 - SYNTHESI2E YOUR KNOWLEDGE This kettle lake forracd...
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