Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 16.3, Problem 1CYL
- describe why selection of
phenotypes can affect the evolution of genotypes?
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What are the different processes that give rise to genetic variation?
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Chapter 16 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 16.1 - define evolution in terms of concepts from...Ch. 16.1 - define equilibrium population and describe the...Ch. 16.2 - Evolution of a Menace The mutant alleles that...Ch. 16.2 - describe how mutation, gene flow, genetic drift,...Ch. 16.2 - A flu vaccination stimulates your immune system to...Ch. 16.2 - If it were true that mutations do occur in...Ch. 16.2 - Explain how the distribution of genotypes in...Ch. 16.2 - If a population grows large again after a...Ch. 16.2 - Prob. 4TCCh. 16.3 - describe why selection of phenotypes can affect...
Ch. 16.3 - A team of phys clans treated four patients with...Ch. 16.3 - If we studied a population of bighorn sheep and...Ch. 16.3 - explain how competition and predation influence...Ch. 16.3 - When selection is directional, is there any limit...Ch. 16.3 - Prob. 3CYLCh. 16.3 - Microbiologists have discovered that alleles...Ch. 16.3 - compare and contrast directional selection,...Ch. 16 - In North America, the average height of adult...Ch. 16 - The ______ provides a simple mathematical model...Ch. 16 - The alleles responsible for antibiotic resistance...Ch. 16 - What is a gene pool? How would you determine the...Ch. 16 - By the 1940s, the whooping crane population had...Ch. 16 - Different versions of the same gene are called...Ch. 16 - Stabilizing selection on a trait tends to a. make...Ch. 16 - Define equilibrium population. Outline the...Ch. 16 - An organisms ______ refers to the specific alleles...Ch. 16 - An adaptation is a. any trait that arises from a...Ch. 16 - How does population size affect the likelihood of...Ch. 16 - A random form of evolution is called ________....Ch. 16 - Which of the following statements about mutations...Ch. 16 - If you measured the allele frequencies of a gene...Ch. 16 - Competition is most Intense between members of...Ch. 16 - Genetic drift occurs a. when different phenotypes...Ch. 16 - People like to say that you cant prove a negative....Ch. 16 - The evolutionary fitness of an organism is...Ch. 16 - Describe the three ways in which natural selection...Ch. 16 - What is sexual selection? How is sexual selection...
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- If our DNA contains all the information about who we are, how can something that does not involve changing the gene sequence cause changes in phenotypes? Describe briefly how these changes happen.arrow_forwardif the recessive allele r is lethal, what genotypes will natural selection benefits ?arrow_forwardAs genomes become sequenced it has become evident that genes become duplicated as a mechanism of evolution. In some cases, recently duplicated genes perform identical functions. Suppose genes R and S are of unlinked genes that in fact arose recently from such a gene duplication event. If two Rr Ss individuals are mated, what would be the phenotypic ratio of their progeny. Assume r is recessive to R and s is recessive to S. 9:7 1:2:1:2:4:2:1:2:1 12:3:1 9:3:3:1 15:1arrow_forward
- Discuss at least one type of genetic variation.arrow_forwardWhat are the causes of genetic variation? Give specific examples.arrow_forwardGeneticists study mitochondrial and Y-chromosome DNA to determine the ancestry of modern humans. Such studies have led to the emergence of mitochondrial Eve and Y-chromosome Adam, whose features above are a far-cry from an artist's interpretation of the Biblical narrative. Their progeny came to have the range of physical features now described as racial differences. How has modern genomics contributed to the debate about the validity and definition of these hypothetical parents and their descendants? References:arrow_forward
- A scientist predicts that the kittens born with a congenital birth defect will be 25% based on the hypothesis that it is caused be a recessive gene in that breed of cat. After surveying several litters, he found that 44 out of 128 kittens had the defect. Is his hypothesis correct? Use Chi-Square to solvearrow_forwardWhat is the difference between a gene and an allele? Identify the following terms as either a phenotype or genotype: a. Pink and round b. RR C. Rr с. d. Soft and squarearrow_forwardThe agouti gene determines coat colour in mice. Heterozygous mice have yellow coats, while homozygous dominant mice have black coats. However, having two copies of the recessive alleles is lethal. In a population of 2 000 mice, 1 082 mice have black coats. a) Calculate the frequency of each allele. Show all your work and express your answer as a value between 0 and 1 rounded to two decimal places. b) What percentage of the mouse population is expected to be carriers of the lethal allele? Show all your work and express your answer rounded to one decimal place. c) How many mice will die during fetal development? Show all your work and round your answer to the closest whole number.arrow_forward
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