Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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 4

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 5

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 6

All variation in mtDNA is caused by mutation.

Accepted Answer

A) True 
 B)False

Question 7

Genetic drift is a result of

Accepted Answer

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

Question 8

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 9

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 10

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 11

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 12

Describe some environmental factors that can influence genotypes.

Accepted Answer

Environmental factors that can influence...

Question 13

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 14

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 15

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 16

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 17

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 18

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 19

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

Accepted Answer

A) True 
 B)False

Question 20

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 ...

Exam 4: Heredity and Evolution

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

Correct AnswerverifiedShow Answer

Gene flow is defined as the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Describe some environmental factors that can influence genotypes.

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

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

Evolution can be most succinctly defined as

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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

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

Correct AnswerverifiedShow Answer

Which is NOT true about random assortment?

Correct AnswerverifiedShow Answer

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

Genetic drift is a result of

Correct AnswerverifiedShow Answer

All variation in mtDNA is caused by mutation.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement concerning polygenic traits is FALSE?

Correct AnswerverifiedShow Answer

Gregor Mendel

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Environmental factors that can influence...
View Answer

Correct Answer
Answered by ExamLex AI
The Modern Synthesis, also known as the ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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 Answer
verified

Correct Answer
Answered by ExamLex AI
Gregor Mendel's discoveries were incredi...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified