Question 1

The only source(s)of new genetic variation in any population is/are

Accepted Answer

A) mutations. 
B) genetic drift. 
C) founder effect. 
D) migration. 
E) natural selection. 
A) mutations. 
B) genetic drift. 
C) founder effect. 
D) migration. 
E) natural selection.

Question 2

Gregor Mendel

Accepted Answer

A) developed theories of evolutionary change. 
B) discovered the structure of the DNA molecule. 
C) studied characteristics that are influenced by several genetic loci. 
D) discovered the fundamental principles of how traits are inherited. 
E) developed the theory of inheritance of acquired characteristics. 
A) developed theories of evolutionary change. 
B) discovered the structure of the DNA molecule. 
C) studied characteristics that are influenced by several genetic loci. 
D) discovered the fundamental principles of how traits are inherited. 
E) developed the theory of inheritance of acquired characteristics.

Question 3

When a person possesses two different alleles at the same locus, and both alleles are expressed in the phenotype, this is called

Accepted Answer

A) recessiveness. 
B) codominance. 
C) dominance. 
D) homozygosity. 
E) X-linkage. 
A) recessiveness. 
B) codominance. 
C) dominance. 
D) homozygosity. 
E) X-linkage.

Question 4

At a hypothetical locus, a man's genotype is Aa. What proportion of his gametes would be expected to receive the A allele?

Accepted Answer

A) 1/3 
B) 1/2 
C) 3/4 
D) 1/4 
E) 1/8 
A) 1/3 
B) 1/2 
C) 3/4 
D) 1/4 
E) 1/8

Question 5

Founder effect refers to a type of genetic drift in which allele frequencies are changed in small populations that are taken from larger populations or are left over from the latter.

Accepted Answer

A) True 
 B)False

Question 6

Mendel's first principle of inheritance is independent assortment.

Accepted Answer

A) True 
 B)False

Question 7

Dominance and recessiveness are all-or-nothing situations because the recessive allele has NO phenotypic effects in heterozygotes.

Accepted Answer

A) True 
 B)False

Question 8

Which gene accounts for 74 percent of the variation in human eye color?

Accepted Answer

A) MC1R 
B) OCA2 
C) DELTA23 
D) FOXP2 
E) HOX 
A) MC1R 
B) OCA2 
C) DELTA23 
D) FOXP2 
E) HOX

Question 9

Describe the role of natural selection as directional and its relation to variation. Explain the example of Hb2 and malaria.

Accepted Answer

Natural selection as a directional force

Question 10

When Mendel crossed true-breeding tall and short parental plants,

Accepted Answer

A) all the offspring were tall. 
B) half the offspring were tall, the other half were short. 
C) all the offspring were short. 
D) the offspring were intermediate in height relative to the two parent plants. 
E) about 90 percent were tall, but the rest were short. 
A) all the offspring were tall. 
B) half the offspring were tall, the other half were short. 
C) all the offspring were short. 
D) the offspring were intermediate in height relative to the two parent plants. 
E) about 90 percent were tall, but the rest were short.

Question 11

Describe and explain the factors that produce and redistribute variation.

Accepted Answer

Variation in a population is produced an

Question 12

What are the typical Mendelian phenotypic and genotypic ratios in the F2 generation for a cross of purebred tall and short plants?  Why are these ratios typical?

Accepted Answer

To provide an answer to your question, w

Question 13

Explain the role of mutation to evolution, and then using the HbS allele to illustrate, describe why fitness levels are a function of the environment.

Accepted Answer

Mutation plays a crucial role in evoluti

Question 14

Explain how two parents who do NOT express a particular trait in their phenotype can nevertheless produce children who express the trait. Give an example of a specific trait or disease where this could occur.

Accepted Answer

This phenomenon can occur when both pare

Question 15

The HbS allele increased in frequency in West African populations due to

Accepted Answer

A) sickle-cell anemia. 
B) genetic drift. 
C) migration. 
D) increased mutation rates. 
E) natural selection. 
A) sickle-cell anemia. 
B) genetic drift. 
C) migration. 
D) increased mutation rates. 
E) natural selection.

Question 16

Discuss the differences between Mendelian and polygenic modes of inheritance. Provide an example of a Mendelian and a polygenic trait.

Accepted Answer

Mendelian inheritance and polygenic inhe

Question 17

Researchers have identified six different modes of Mendelian inheritance.

Accepted Answer

A) True 
 B)False

Question 18

In Mendel's experiments, the ratio of tall to short plants in the F2 generation was

Accepted Answer

A) 15 to 1. 
B) 3 to 1. 
C) 1 to 1. 
D) 4 to 1. 
E) 5 to 1. 
A) 15 to 1. 
B) 3 to 1. 
C) 1 to 1. 
D) 4 to 1. 
E) 5 to 1.

Question 19

Mendelian traits are more likely to be influenced by environmental factors.

Accepted Answer

A) True 
 B)False

Question 20

Many human genetic result from harmful alleles inherited in a Mendelian manner.

Accepted Answer

A) True 
 B)False

The only source(s)of new genetic variation in any population is/are

Gregor Mendel

When a person possesses two different alleles at the same locus, and both alleles are expressed in the phenotype, this is called

At a hypothetical locus, a man's genotype is Aa. What proportion of his gametes would be expected to receive the A allele?

Founder effect refers to a type of genetic drift in which allele frequencies are changed in small populations that are taken from larger populations or are left over from the latter.

Mendel's first principle of inheritance is independent assortment.

Dominance and recessiveness are all-or-nothing situations because the recessive allele has NO phenotypic effects in heterozygotes.

Which gene accounts for 74 percent of the variation in human eye color?

Describe the role of natural selection as directional and its relation to variation. Explain the example of Hb² and malaria.

When Mendel crossed true-breeding tall and short parental plants,

Describe and explain the factors that produce and redistribute variation.

What are the typical Mendelian phenotypic and genotypic ratios in the F₂ generation for a cross of purebred tall and short plants? Why are these ratios typical?

Explain the role of mutation to evolution, and then using the Hb^S allele to illustrate, describe why fitness levels are a function of the environment.

Explain how two parents who do NOT express a particular trait in their phenotype can nevertheless produce children who express the trait. Give an example of a specific trait or disease where this could occur.

The Hb^S allele increased in frequency in West African populations due to

Discuss the differences between Mendelian and polygenic modes of inheritance. Provide an example of a Mendelian and a polygenic trait.

Researchers have identified six different modes of Mendelian inheritance.

In Mendel's experiments, the ratio of tall to short plants in the F₂ generation was

Mendelian traits are more likely to be influenced by environmental factors.

Many human genetic result from harmful alleles inherited in a Mendelian manner.

Introduction to Physical Anthropology

The Development of Evolutionary Theory

The Biological Basis of Life

Macroevolution: Processes of Vertebrate and Mammalian Evolution

Survey of the Living Primates

Primate Behavior

Overview of the Fossil Primates

Paleoanthropology: Reconstructing Early Hominin Behavior and Ecology

Hominin Origins in Africa

The First Dispersal of the Genus Homo: Homo Erectus and Contemporaries

Premodern Humans

The Origin and Dispersal of Modern Humans

Modern Human Biology: Patterns of Variation

Modern Human Biology: Patterns of Adaptation

Legacies of Human Evolutionary History: Effects on the Human Life Course

The Human Disconnection

Filters

Exam 4: Heredity and Evolution

The only source(s)of new genetic variation in any population is/are

Gregor Mendel

When a person possesses two different alleles at the same locus, and both alleles are expressed in the phenotype, this is called

At a hypothetical locus, a man's genotype is Aa. What proportion of his gametes would be expected to receive the A allele?

Founder effect refers to a type of genetic drift in which allele frequencies are changed in small populations that are taken from larger populations or are left over from the latter.

Mendel's first principle of inheritance is independent assortment.

Dominance and recessiveness are all-or-nothing situations because the recessive allele has NO phenotypic effects in heterozygotes.

Which gene accounts for 74 percent of the variation in human eye color?

Describe the role of natural selection as directional and its relation to variation. Explain the example of Hb2 and malaria.

When Mendel crossed true-breeding tall and short parental plants,

Describe and explain the factors that produce and redistribute variation.

What are the typical Mendelian phenotypic and genotypic ratios in the F2 generation for a cross of purebred tall and short plants? Why are these ratios typical?

Explain the role of mutation to evolution, and then using the HbS allele to illustrate, describe why fitness levels are a function of the environment.

Explain how two parents who do NOT express a particular trait in their phenotype can nevertheless produce children who express the trait. Give an example of a specific trait or disease where this could occur.

The HbS allele increased in frequency in West African populations due to

Discuss the differences between Mendelian and polygenic modes of inheritance. Provide an example of a Mendelian and a polygenic trait.

Researchers have identified six different modes of Mendelian inheritance.

In Mendel's experiments, the ratio of tall to short plants in the F2 generation was

Mendelian traits are more likely to be influenced by environmental factors.

Many human genetic result from harmful alleles inherited in a Mendelian manner.

Introduction to Physical Anthropology

The Development of Evolutionary Theory

The Biological Basis of Life

Macroevolution: Processes of Vertebrate and Mammalian Evolution

Survey of the Living Primates

Primate Behavior

Overview of the Fossil Primates

Paleoanthropology: Reconstructing Early Hominin Behavior and Ecology

Hominin Origins in Africa

The First Dispersal of the Genus Homo: Homo Erectus and Contemporaries

Premodern Humans

The Origin and Dispersal of Modern Humans

Modern Human Biology: Patterns of Variation

Modern Human Biology: Patterns of Adaptation

Legacies of Human Evolutionary History: Effects on the Human Life Course

The Human Disconnection

Filters

Describe the role of natural selection as directional and its relation to variation. Explain the example of Hb² and malaria.

What are the typical Mendelian phenotypic and genotypic ratios in the F₂ generation for a cross of purebred tall and short plants? Why are these ratios typical?

Explain the role of mutation to evolution, and then using the Hb^S allele to illustrate, describe why fitness levels are a function of the environment.

The Hb^S allele increased in frequency in West African populations due to

In Mendel's experiments, the ratio of tall to short plants in the F₂ generation was