Modified Mastering Biology With Pearson Etext -- Standalone Access Card -- For Biological Science (7th Edition)
7th Edition
ISBN: 9780135276556
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 22, Problem 11PIAT
How can natural selection on mouse color be measured?
Most mice living on the mainland of Florida are brown, but the mice that live on the sand dunes of the barrier islands have white fur (see Chapter 16). It is intuitive that the light color of beach-dwelling mice is an adaptation for blending into their environment–and thus evading predators. How can this hypothesis be tested?
Compare and contrast how evolution by inheritance of acquired characters and the theory of evolution by natural selection would explain the observation of white mice living on light soil and brown mice living on dark soil.
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10. Consider the following enzyme and its substrate where the "+" and "-" indicate cations and
anions, respectively. Explain which of the following inhibitors could inhibit this enzyme?
Which type of inhibitor would it be and why? (Video 5-2)
Substrate
Enzyme
Potential inhibitors
Using Punnett Squares Punnett squares are one good
way to predict the outcome of genetic crosses. Punnett
squares use mathematical probability to help predict the
genotype and phenotype combinations in genetic crosses. The
number of possible alleles from each parent determines the
number of rows and columns in the Punnett square.
Independent Assortment
KEY QUESTION How do alleles segregate when more than
one gene is involved?
Mendel wondered if the segregation of one pair of alleles
affects another pair. For example, does the gene that
determines the shape of a seed affect the gene for seed color?
This type of experiment is known as a two-factor, or dihybrid,
cross because it involves two different genes. Single-gene
crosses are monohybrid crosses.
Visual Reading Tool: Two-Factor Cross: F₂
The Punnett square shows the
results of self-crossing the F,
generation of a cross between
round yellow peas and wrinkled
green peas.
1. List the different genotypes in
the F, generation. What is the…
CHAPTER 12
LESSON
2
Applying Mendel's Principles
READING TOOL Connect to Visuals Before you read, preview Figure 12-7. Try to infer the
purpose of this diagram. As you read, compare your inference to the text. After you read, revise
your statement if needed or write a new one about the diagram's purpose. Take notes on the lines
provided. Then view the Punnett square and answer the questions below regarding the genotypes
and phenotypes.
Inference:
Revision:
Parent 2
rryy
Gametes
F
ry
Parent 1
RRYY
Gametes
RY
RrYy
The F, generation are all RrYy.
1. What is the phenotype of
parent 1?.
2. What is the genotype of parent 1?
3. What is the phenotype of parent 2?
4. What is the genotype of parent 2?
5. What is the phenotype of the F, offspring?.
6. What is the genotype of the F, offspring?.
7. What kind of cross does this figure describe?
144
Chanter 12 Introduction to Genetice
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Chapter 22 Solutions
Modified Mastering Biology With Pearson Etext -- Standalone Access Card -- For Biological Science (7th Edition)
Ch. 22 - True or false? Some trails are considered...Ch. 22 - 3. Trails that are derived from a common ancestor,...Ch. 22 - Some biologists summarize evolution by natural...Ch. 22 - Prob. 7TYUCh. 22 - SOCIETY Explain why the overprescription of...Ch. 22 - Prob. 10TYPSSCh. 22 - How can natural selection on mouse color be...Ch. 22 - Apply Darwin’s four postulates to a population of...Ch. 22 - 14. PROCESS OF SCIENCE A team lead by evolutionary...Ch. 22 - 16. PROCESS OF SCIENCE When a statistical test was...
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