BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 17.5, Problem 1CC
Summary Introduction
To determine:
If it is possible to study the norm of reaction on a population of wild squirrels.
Introduction:
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EXERCISE 5 MENDELIAN TRAITS IN HUMANS 1
While most human traits are polygenic, the traits in the chart below have
traditionally been considered Mendelian traits. More recent research has
disputed the single-gene nature of some of these traits, but for the purpose
of this exercise, assume that the following traits are Mendelian.
Work with a partner to help each other determine your own phenotypes and
possible genotypes for these traits. Write your answers in the chart. (Note:
Refer to the table on p. 62 for information about these traits.)
Mendelian Trait
Cleft Chin (Dominant)
Freckles (Dominant)
Attached Earlobes
(Recessive)
Hitchhiker's Thumb
(Recessive)
Widow's Peak (Dominant)
Your
Your Possible
Phenotype Genotype(s)
atural Selection - DA # 3
Flgure A shows the color of deer mice (Peromyscus maniculatus) In the Nebraska
Sand Hills (white area) and the rest of the State (grey area). Mice are shown on
the habitat they are not nomally found on. The color of the Sand Hills Is shown
below the light-colored mouse (normal habltat), while the color of the ground in
the rest of the State is shown below the dark-colored mouse. Figure B shows the
phenotyplc difference in the hair shaft of the wild-type and the light-colored
(wideband) mice. Figure C shows the expressilon levels (MRNA) of the Agouti
alleles responsīble for the phenotype seen in figure B. a+= wild-type Agouti alele,
a-= a deletion of the Agouti allele, awb = wideband Agouti allele mutation, and
the black rectangles undermeath each bar is the relative difference in the hair
shaft band phenotype. Wder band means lighter hair color in the deer mice. b.
The Sand Hills were created by volcanic activity 15,000-8,000 years ago. How
were the deer mice…
EXERCISE 6 HARDY-WEINBERG EQUILIBRIUM
Work in a small group or alone to complete this exercise. In human
population X, consider the simple Mendelian trait for freckles. F is the
dominant allele and f'is the recessive allele. Individuals who are
homozygous dominant (FF) or heterozygous (F) for the trait express
freckles. Individuals who are homozygous recessive (ff) for the trait do not
express freckles. In this population, 30% (0.3) of the alleles are recessive (f
) and 70% (0.7) are dominant (F).
1. Use the Hardy-Weinberg equation to determine the genotype
frequencies we should expect in the next generation. Be sure to show
your work.
2. You have collected data on the observed genotype frequencies of the
next generation. They are 60% FF, 30% Ff, and 10% ff. Based on these
observations and your expectations, is this trait currently evolving in
this population? Why or why not?
Chapter 17 Solutions
BIOLOGY-TEXT
Ch. 17.1 - Prob. 1CCCh. 17.1 - Prob. 2CCCh. 17.1 - Prob. 3CCCh. 17.1 - Prob. 4CCCh. 17.1 - Mendels Laws of Inheritance Concept Check: What...Ch. 17.2 - Prob. 1CSCh. 17.2 - Prob. 2CSCh. 17.2 - Prob. 1CCCh. 17.3 - Prob. 1CCCh. 17.3 - Prob. 2CC
Ch. 17.4 - Prob. 1CCCh. 17.4 - Prob. 1EQCh. 17.4 - Prob. 2EQCh. 17.4 - Prob. 3EQCh. 17.5 - Prob. 1CSCh. 17.5 - Prob. 1CCCh. 17.6 - Prob. 1CCCh. 17 - Prob. 1TYCh. 17 - During which phase of nuclear division does the...Ch. 17 - Prob. 3TYCh. 17 - Which of Mendels laws cannot be observed in a...Ch. 17 - During a __________blank, an individual with the...Ch. 17 - Prob. 6TYCh. 17 - Prob. 7TYCh. 17 - A hypothetical flowering plant species produces...Ch. 17 - Genes located on a sex chromosome are said to be...Ch. 17 - Prob. 10TYCh. 17 - Prob. 1CQCh. 17 - A cross is made between individuals having the...Ch. 17 - Core Concept: Systems We can view life as a...Ch. 17 - Discuss the principles of the chromosome theory of...Ch. 17 - When examining a human pedigree, what patterns do...
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