Question 1

Explain the concepts of dominance, co-dominance, and recessiveness as used in modern genetics.

Accepted Answer

The answer of Explain the concepts of dominance, co-dominance, and...

Question 2

The HbS allele increased in frequency in West African populations due to which of the following?

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 3

Evolution can be described as a two-stage process that includes which of the following?

Accepted Answer

A)  genetic drift followed by migration 
B)  natural selection followed by migration 
C)  recombination followed by mutation 
D)  production of variation followed by natural selection acting on this variation 
E)  production and distribution of variation 
A)  genetic drift followed by migration 
B)  natural selection followed by migration 
C)  recombination followed by mutation 
D)  production of variation followed by natural selection acting on this variation 
E)  production and distribution of variation

Question 4

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 5

Which of the following is not a polygenic trait?

Accepted Answer

A)  stature 
B)  skin color 
C)  eye color 
D)  ABO blood type 
E)  hair color 
A)  stature 
B)  skin color 
C)  eye color 
D)  ABO blood type 
E)  hair color

Question 6

The ABO blood type system consists of ______ alleles.

Accepted Answer

A)  6 
B)  4 
C)  3 
D)  2 
E)  5 
A)  6 
B)  4 
C)  3 
D)  2 
E)  5

Question 7

What is an individual's actual genetic make-up called?

Accepted Answer

A)  phenotype 
B)  homozygosity 
C)  recessiveness 
D)  phenotypic ratio 
E)  genotype 
A)  phenotype 
B)  homozygosity 
C)  recessiveness 
D)  phenotypic ratio 
E)  genotype

Question 8

What is it called when a person possesses two different alleles at the same locus, and both alleles are expressed in the phenotype?

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 9

Explain Mendel's principle of independent assortment.

Accepted Answer

Mendel's principle of independent assort

Question 10

Evolution can be most succinctly defined as

Accepted Answer

A)  the appearance of new species 
B)  the change from one species to another in one generation 
C)  the change in allele frequency from one generation to the next 
D)  any type of genetic mutation 
E)  genetic drift 
A)  the appearance of new species 
B)  the change from one species to another in one generation 
C)  the change in allele frequency from one generation to the next 
D)  any type of genetic mutation 
E)  genetic drift

Question 11

Gregor Mendel

Accepted Answer

A)  published his results and won the Nobel Prize for his discoveries 
B)  was trained as a geneticist 
C)  did not know about chromosomes 
D)  was a professor at the University of Vienna 
E)  never published his work 
A)  published his results and won the Nobel Prize for his discoveries 
B)  was trained as a geneticist 
C)  did not know about chromosomes 
D)  was a professor at the University of Vienna 
E)  never published his work

Question 12

What is meant by the statement, "natural selection is the one factor that can cause directional change in allele frequency relative to specific environmental factors"?

Accepted Answer

The statement "natural selection is the

Question 13

Mitochondrial DNA mtDNA) is extremely useful for studying genetic change over time.

Accepted Answer

A) True 
 B)False

Question 14

In order for a mutation to be passed on to offspring, the mutation must

Accepted Answer

A)  occur in a gamete 
B)  be beneficial 
C)  occur in a somatic cell 
D)  result in additional chromosomes 
E)  have negative evolutionary consequences 
A)  occur in a gamete 
B)  be beneficial 
C)  occur in a somatic cell 
D)  result in additional chromosomes 
E)  have negative evolutionary consequences

Question 15

Polygenic traits

Accepted Answer

A)  are discrete 
B)  have a continuous range of expression 
C)  are controlled by only one genetic locus 
D)  include the ABO blood type system and cystic fibrosis 
E)  are also called Mendelian traits 
A)  are discrete 
B)  have a continuous range of expression 
C)  are controlled by only one genetic locus 
D)  include the ABO blood type system and cystic fibrosis 
E)  are also called Mendelian traits

Question 16

Which of the statements below is false regarding the relationship between malaria and the HbS allele?

Accepted Answer

A)  There is no geographic correlation between the distribution of the HbS allele and malaria. 
B)  Heterozygotes have greater resistance to malaria than homozygous individuals. 
C)  The malarial parasite does not reproduce very well in the red blood cells of heterozygotes. 
D)  Malaria is caused by the Plasmodium parasite. 
E)  Most people are homozygous for the HbA allele. 
A)  There is no geographic correlation between the distribution of the HbS allele and malaria. 
B)  Heterozygotes have greater resistance to malaria than homozygous individuals. 
C)  The malarial parasite does not reproduce very well in the red blood cells of heterozygotes. 
D)  Malaria is caused by the Plasmodium parasite. 
E)  Most people are homozygous for the HbA allele.

Question 17

In a hypothetical situation, B is the allele that causes brachydactyly. If a man who has normal fingers bb) and a woman with brachydactyly Bb) have children, what proportion of these children would you expect to have normal fingers? Hint: Use a Punnett square).

Accepted Answer

A)  None 
B)  All 
C)  1/4 
D)  3/4 
E)  1/2 
A)  None 
B)  All 
C)  1/4 
D)  3/4 
E)  1/2

Question 18

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)  All 
B)  ½ 
C)  ¾ 
D)  ¼ 
E)  None 
A)  All 
B)  ½ 
C)  ¾ 
D)  ¼ 
E)  None

Question 19

Which statement concerning polygenic traits is not true?

Accepted Answer

A)  They are governed by more than one genetic locus. 
B)  Their expression is often influenced by genetic/environmental interactions. 
C)  The alleles have an additive effect on the phenotype. 
D)  They are continuous traits 
E)  The most frequently discussed are skin, hair and eye color. 
A)  They are governed by more than one genetic locus. 
B)  Their expression is often influenced by genetic/environmental interactions. 
C)  The alleles have an additive effect on the phenotype. 
D)  They are continuous traits 
E)  The most frequently discussed are skin, hair and eye color.

Question 20

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

Explain the concepts of dominance, co-dominance, and recessiveness as used in modern genetics.

The Hb^S allele increased in frequency in West African populations due to which of the following?

Evolution can be described as a two-stage process that includes which of the following?

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

Which of the following is not a polygenic trait?

The ABO blood type system consists of ______ alleles.

What is an individual's actual genetic make-up called?

What is it called when a person possesses two different alleles at the same locus, and both alleles are expressed in the phenotype?

Explain Mendel's principle of independent assortment.

Evolution can be most succinctly defined as

Gregor Mendel

What is meant by the statement, "natural selection is the one factor that can cause directional change in allele frequency relative to specific environmental factors"?

Mitochondrial DNA mtDNA) is extremely useful for studying genetic change over time.

In order for a mutation to be passed on to offspring, the mutation must

Polygenic traits

Which of the statements below is false regarding the relationship between malaria and the Hb^S allele?

In a hypothetical situation, B is the allele that causes brachydactyly. If a man who has normal fingers bb) and a woman with brachydactyly Bb) have children, what proportion of these children would you expect to have normal fingers? Hint: Use a Punnett square).

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

Which statement concerning polygenic traits is not true?

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.

Introduction to Physical Anthropology

The Development of Evolutionary Theory

The Biological Basis of Life Connections

Processes of Macroevolution

An Overview of the Primates

Primate Behavior

Primate and Hominin Origins

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

Premodern Humans

The Origin and Dispersal of Modern Humans

Human Variation and Adaptation

Legacies of Human Evolutionary History: Effects on the Individual

The Human Disconnection

Filters

Exam 4: Heredity and Evolution

Explain the concepts of dominance, co-dominance, and recessiveness as used in modern genetics.

The HbS allele increased in frequency in West African populations due to which of the following?

Evolution can be described as a two-stage process that includes which of the following?

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

Which of the following is not a polygenic trait?

The ABO blood type system consists of ______ alleles.

What is an individual's actual genetic make-up called?

What is it called when a person possesses two different alleles at the same locus, and both alleles are expressed in the phenotype?

Explain Mendel's principle of independent assortment.

Evolution can be most succinctly defined as

Gregor Mendel

What is meant by the statement, "natural selection is the one factor that can cause directional change in allele frequency relative to specific environmental factors"?

Mitochondrial DNA mtDNA) is extremely useful for studying genetic change over time.

In order for a mutation to be passed on to offspring, the mutation must

Polygenic traits

Which of the statements below is false regarding the relationship between malaria and the HbS allele?

In a hypothetical situation, B is the allele that causes brachydactyly. If a man who has normal fingers bb) and a woman with brachydactyly Bb) have children, what proportion of these children would you expect to have normal fingers? Hint: Use a Punnett square).

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

Which statement concerning polygenic traits is not true?

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.

Introduction to Physical Anthropology

The Development of Evolutionary Theory

The Biological Basis of Life Connections

Processes of Macroevolution

An Overview of the Primates

Primate Behavior

Primate and Hominin Origins

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

Premodern Humans

The Origin and Dispersal of Modern Humans

Human Variation and Adaptation

Legacies of Human Evolutionary History: Effects on the Individual

The Human Disconnection

Filters

The Hb^S allele increased in frequency in West African populations due to which of the following?

Which of the statements below is false regarding the relationship between malaria and the Hb^S allele?