BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 12, Problem 3MCQ
Summary Introduction
Introduction:
Alleles are defined as the gene units that code for a particular
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In achondroplastic dwarfism, an autosomal dominant disease, the gene is lethal in homozygotes. If the frequency of the normal allele is 0.99, what is the heterozygote frequency?
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Chapter 12 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 12.1 - What are two ways to define evolution?Ch. 12.1 - Prob. 2MCCh. 12.2 - Prob. 1MCCh. 12.2 - What did Darwin observe that led him to develop...Ch. 12.2 - What is modern evolutionary synthesis?Ch. 12.3 - Prob. 1MCCh. 12.3 - Prob. 2MCCh. 12.3 - Prob. 3MCCh. 12.3 - Prob. 4MCCh. 12.4 - Prob. 1MC
Ch. 12.4 - Why doesnt Hardy-Weinberg equilibrium occur in...Ch. 12.5 - Distinguish among directional, disruptive, and...Ch. 12.5 - How can natural selection maintain harmful alleles...Ch. 12.6 - Prob. 1MCCh. 12.6 - Prob. 2MCCh. 12.7 - How do mutations affect an organisms phenotype?Ch. 12.7 - South china tigers once had two color patterns...Ch. 12.7 - Prob. 3MCCh. 12.7 - Prob. 4MCCh. 12 - Microevolution applies to changes that occur a....Ch. 12 - Biological evolution describes how ____ change...Ch. 12 - Prob. 3MCQCh. 12 - What is the most accurate way to explain the...Ch. 12 - Suppose that after an environmental change, foxes...Ch. 12 - Huntington disease is caused by a rare, lethal,...Ch. 12 - A population of 100 sea stars is in Hardy-Weinberg...Ch. 12 - Prob. 8MCQCh. 12 - Darwin observed that different types of organisms...Ch. 12 - Which of the following processes is nonrandom? a....Ch. 12 - Prob. 1WIOCh. 12 - Prob. 2WIOCh. 12 - Explain how understanding evolution is important...Ch. 12 - Write a paragraph that describes the connections...Ch. 12 - Jellyfish Lake, located on the Pacific island of...Ch. 12 - Prob. 6WIOCh. 12 - Explain how harmful recessive alleles can persist...Ch. 12 - Prob. 8WIOCh. 12 - Describe the competing selective forces acting on...Ch. 12 - Some researchers suggest that a giraffes long neck...Ch. 12 - Burning Question 12.1 explains why an organism...Ch. 12 - Review the Survey the Landscape figure in the...Ch. 12 - Describe situations in which the five mechanisms...Ch. 12 - Prob. 3PIT
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- The frequency of the defective allele of a gene for an autosomal dominant disorder is 1/5. In a population of 500,000 individuals how many individuals are affected? Select one: a. 20,000 O b. 180,000 C. 160,000 d. 320,000arrow_forwardThe frequency of the defective allele of a gene for an autosomal recessive disorder is 1/10. In a population of 100,000 individuals how many individuals are affected? Select one: a. 18,000 O b. 19,000 O C. 81,000 O d. 1,000arrow_forwardSuppose a population of mice is subject to a few years of very cold, dry winters that drastically decreases their numbers. After the decrease in population size, there was a population of 200 mice, with 182 showing the dominant long tail phenotype and 18 showing the recessive short tail phenotype. a. What is the frequency of the recessive allele? b. What is the frequency of the dominant allele?arrow_forward
- We observe disruptive selection when the extreme values of a trait such as light and dark coat colors are selected for instead of a medium coat color? A. true b. Falsearrow_forwardf there are 300 diploid individuals in a population, how many alleles are in the total gene pool? a. 1200 b. 150 c. 300 d. 600arrow_forwardA population of birds may have red feathers or orange feathers. Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype rr. The frequency of the RR genotype is .46 a. What is the frequency of heterozygous birds? B. What is the frequency of the R allele ? C. What is the frequency of r allele?arrow_forward
- 1b.) Which is NOT commonly an effect of inbreeding in a population? a. an increase in the frequency of homozygous dominant individuals b. an increase in the frequency of homozygous recessive individuals c. an increase in the frequency of recessive genetic diseases d. better health and fertility of inbreds lines compared to lines that are not inbred.arrow_forwardAssume you are studying a population of hummingbirds. The population has an average beak length of 20 millimeters, but a drought removes one type of flower that only long-beaked hummingbirds survive. The surviving population has an average beak length of 28 millimeters. You know that the heritability is 0.25. What is the predicted response to selection? a. 8 millimeters b. 0 millimeters c. 2 millimeters d. 4 millimetersarrow_forwardSuppose that in a population the frequency of a particular recessive condition is 1/400. Assume this is locus with two alleles (A and a) in the population and that the population is at Hardy–Weinberg equilibrium. What is the frequency of the carriers of this condition in the population? A. 0.9025 B. 0.0025 C. 0.05 D. 0.095 E. 0.0475arrow_forward
- Which statement about Inbreeding (=consanguinity) is correct? a. Inbreeding has no influence on the degree of homozygosity. b. Inbreeding increases the frequency of homozygotes in a population. c. Inbreeding improves the overall biological fitness of progeny. d. Inbreeding increases the frequency of heterozygotes in a population.arrow_forwardPlease read the scenario below, and then answer the question (in bold) that follows. Tay-Sachs disease is a fatal autosomal recessive disorder in children (usually by age 5) that causes a progressive degeneration of the central nervous system. This disease affects 1 in 3,500 newborns of European Ashkenazi Jewish ancestry in the U.S. population. What is the number of carriers in the population? a. 1 person b. 60 persons c. 116 persons d. 3,383 persons e. 3,441 personsarrow_forwardPopulation genetics is the study of ________. a. how allele frequencies in a population change over time b. populations of cells in an individual c. the rate of population growth d. how genes affect embryological developmentarrow_forward
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