Question 1

Which of the following is NOT inherited in a Mendelian fashion?

Accepted Answer

A)  ABO blood type
B)  Marfan syndrome
C)  Achondroplasia
D)  Phenylketonuria
E)  Skin color

Question 2

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)  a change in allele frequencies from one generation to the next.
D)  any type of genetic mutation.
E)  genetic drift.

Question 3

Explain the importance of the discoveries of Gregor Mendel to genetics and include an explanation of each of his principles.

Accepted Answer

Gregor Mendel's discoveries were incredi...

Question 4

Which statement concerning polygenic traits is FALSE?

Accepted Answer

A)  They are governed by more than one genetic locus.
B)  Their expression is often influenced by genetic/environmental interactions.
C)  They account for most observable phenotypic variation in humans.
D)  They are not affected by environmental factors.
E)  They are continuous.

Question 5

Mendel worked with animal populations to formulate his principles of inheritance.

Accepted Answer

A) True 
 B)False

Question 6

Gene flow is defined as the

Accepted Answer

A)  production of new alleles.
B)  production of new genetic material.
C)  chance loss of alleles in a population.
D)  exchange of genes between populations.
E)  differential reproductive success of individuals.

Question 7

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)  1/16
B)  1/8
C)  1/4
D)  3/4
E)  1/2

Question 8

Which is NOT true about random assortment?

Accepted Answer

A)  There is a chance distribution of chromosomes to daughter cells.
B)  It is an important source of genetic variation.
C)  It produces new alleles.
D)  It happens during meiosis.
E)  It is important like recombination.

Question 9

Discuss Modern Synthesis and its importance in bringing together natural selection and mutation as joint forces in biological evolution.

Accepted Answer

The Modern Synthesis, also known as the ...

Question 10

According to Modern Synthesis, evolution can be defined as a two-stage process that includes

Accepted Answer

A)  genetic drift followed by migration.
B)  natural selection followed by migration.
C)  recombination followed by mutation.
D)  variation followed by natural selection.
E)  mutation and gene drift.

Question 11

X-linked traits affect males and females in equal frequencies.

Accepted Answer

A) True 
 B)False

Question 12

Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T) . The inability to taste PTC is caused by a recessive allele (t) . What proportion of their children would be expected to have the tt genotype?

Accepted Answer

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

Question 13

All variation in mtDNA is caused by mutation.

Accepted Answer

A) True 
 B)False

Question 14

The majority of sex-linked traits have loci on the X chromosome.

Accepted Answer

A) True 
 B)False

Question 15

Describe some environmental factors that can influence genotypes.

Accepted Answer

Environmental factors that can influence...

Question 16

Gregor Mendel

Accepted Answer

A)  published his results and won the Nobel Prize for his discoveries.
B)  was trained as a geneticist.
C)  died before the importance of his research was recognized.
D)  was a professor at the University of Vienna.
E)  never published his work.

Question 17

In order for a mutation to be passed on to an 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)  be a point mutation only.

Question 18

The fact that both green and yellow peas were produced by tall pea plants in predictable frequencies  led Mendel to propose the

Accepted Answer

A)  principle of segregation.
B)  principle of independent assortment.
C)  concept of dominance.
D)  concept of codominance.
E)  blending theory of inheritance.

Question 19

When Mendel crossed plants and considered two traits simultaneously (e.g., height and seed color in peas) , what proportion of the F2 generation offspring expressed both recessive phenotypes?

Accepted Answer

A)  9/16
B)  8/16
C)  12/16
D)  3/16
E)  1/16

Question 20

Genetic drift is a result of

Accepted Answer

A)  migrations.
B)  an increase in population.
C)  genetic diseases.
D)  mutations.
E)  a small population.

Exam 4: Heredity and Evolution

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.)

Correct AnswerverifiedShow Answer

Gene flow is defined as the

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Gregor Mendel

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Discuss Modern Synthesis and its importance in bringing together natural selection and mutation as joint forces in biological evolution.

Correct AnswerAnswered by ExamLex AIThe Modern Synthesis, also known as the ...View AnswerShow Answer

Which of the following is NOT inherited in a Mendelian fashion?

Correct AnswerverifiedShow Answer

Explain the importance of the discoveries of Gregor Mendel to genetics and include an explanation of each of his principles.

Correct AnswerAnswered by ExamLex AIGregor Mendel's discoveries were incredi...View AnswerShow Answer

The majority of sex-linked traits have loci on the X chromosome.

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X-linked traits affect males and females in equal frequencies.

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Genetic drift is a result of

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Describe some environmental factors that can influence genotypes.

Correct AnswerAnswered by ExamLex AIEnvironmental factors that can influence...View AnswerShow Answer

Evolution can be most succinctly defined as

Correct AnswerverifiedShow Answer

When Mendel crossed plants and considered two traits simultaneously (e.g., height and seed color in peas) , what proportion of the F2 generation offspring expressed both recessive phenotypes?

Correct AnswerverifiedShow Answer

Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T) . The inability to taste PTC is caused by a recessive allele (t) . What proportion of their children would be expected to have the tt genotype?

Correct AnswerverifiedShow Answer

Which is NOT true about random assortment?

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All variation in mtDNA is caused by mutation.

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Which statement concerning polygenic traits is FALSE?

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Mendel worked with animal populations to formulate his principles of inheritance.

Correct AnswerverifiedShow Answer

The fact that both green and yellow peas were produced by tall pea plants in predictable frequencies led Mendel to propose the

Correct AnswerverifiedShow Answer

According to Modern Synthesis, evolution can be defined as a two-stage process that includes

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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The Modern Synthesis, also known as the ...
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Gregor Mendel's discoveries were incredi...
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Environmental factors that can influence...
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When Mendel crossed plants and considered two traits simultaneously (e.g., height and seed color in peas) , what proportion of the F₂ generation offspring expressed both recessive phenotypes?

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