Question 1

Height is an example a character that displays continuous variation in humans. What is the reason for the range of heights in humans?

Accepted Answer

A)   There is incomplete dominance of the tall allele over the short allele.
B)   There are multiple alleles for the height gene.
C)   Most traits such as height are governed by the interaction of many genes.
D)   There is only one gene for height in humans, but the environment can influence the expression of the gene.E) B) and C)
F) None of the above

Question 2

Mendel wanted to make sure his starting plants bred true, meaning the:

Accepted Answer

A)   seeds would always sprout.
B)   peas would always be green.
C)   phenotypes of the offspring in each generation could not be predictable.
D)   phenotypes of the offspring in each generation were always the same as the parent.
E)   phenotypes of the offspring in each generation would sometimes look like the male parent and sometimes look like the female parent.F) B) and E)
G) B) and C) D

Question 3

List two characteristics of the garden pea plant, Pisum sativum, that make it an ideal organism for genetic experiments.

Accepted Answer

It can be self-fertilized or cross-ferti...

Question 4

A true-breeding strain of red tulips is crossed to a true-breeding strain of white tulips. All the offspring have pink flowers. When a pink-flowered plant is self-fertilized, the offspring have red, pink, and white flowers, in the ratio 1:2:1. This type of inheritance is an example of ________.

Accepted Answer

incomplete...

Question 5

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What pea phenotype would be produced by the genotype SsYy?

Accepted Answer

A)   smooth, yellow
B)   smooth, green
C)   wrinkled, yellow
D)   wrinkled, greenE) A) and B)
F) A) and C)

Question 6

A particular quality of an organism is referred to as a ________, each variation of which is a particular ________.

Accepted Answer

The answer of A particular quality of an organism is...

Question 7

A and a are dominant and recessive alleles, respectively, of the same gene. Which genotype(s)  would result in an individual with the dominant phenotype?

Accepted Answer

A)   AA and aa
B)   Aa and aa
C)   only AA
D)   AA and Aa
E)   only AaF) A) and E)
G) A) and D) D

Question 8

If an individual has genotype AaBb, how many different gametes can he or she produce? What combinations of alleles are possible?

Accepted Answer

The individual can p...

Question 9

Mendel crossed true-breeding pea plants and found the dominant trait always appeared in the F1 generation, but it appeared in a ________ ratio of dominant to recessive in the F2 generation.

Accepted Answer

A)   1:3
B)   1:2
C)   3:1
D)   1:1E) B) and D)
F) B) and C)

Question 10

If a person has a recessive trait, the genotype must be homozygous recessive for the trait.

Accepted Answer

A) True 
 B)False

Question 11

In order to track the inheritance of a single character, you would need to do a:

Accepted Answer

A)   monohybrid cross.
B)   dihybrid cross.
C)   trihybrid cross.
D)   true-breeding cross.E) None of the above
F) A) and D)

Question 12

What is the term for an observable trait of an organism?

Accepted Answer

A)   element
B)   phenotype
C)   hybrid
D)   genotype
E)   alleleF) B) and C)
G) None of the above

Question 13

Widow's-peak hairline in humans is dominant to non-widow's-peak hairline. If a person has a widow's-peak hairline, what is his or her genotype?

Accepted Answer

A)   The genotype must be homozygous recessive.
B)   The genotype is either homozygous dominant or homozygous recessive.
C)   The genotype must be heterozygous.
D)   The genotype is either heterozygous or homozygous dominant.
E)   The genotype must be homozygous dominant.F) None of the above
G) A) and E)

Question 14

In humans, freckles are dominant to no freckles, and unattached earlobes are dominant to attached earlobes. Two individuals who both have freckles and unattached earlobes have a child with no freckles and attached earlobes. What are the genotypes of the parents? (F = freckles; E = unattached earlobes)

Accepted Answer

A)   FFEE x ffee
B)   Ffee x FFEE
C)   FfEe x FfEe
D)   FFEE x FFEe
E)   ffee x ffeeF) A) and B)
G) B) and C)

Question 15

The Law of Independent Assortment states that:

Accepted Answer

A)   in meiosis, crossing over creates genetically diverse gametes.
B)   in fertilization, the combining of sperm and eggs is random.
C)   generation of male and female gametes must occur in separate organisms.
D)   in any dihybrid cross, it is possible to get any combination of phenotypes.
E)   in gamete formation, gene pairs are transmitted independently of each other.F) A) and D)
G) A) and E)

Question 16

Cystic fibrosis (CF)  is caused by a recessive allele. A child has CF, even though neither of his parents has CF. This couple also has a child who does not have CF. What is the probability the unaffected child is heterozygous?

Accepted Answer

A)   2/3
B)   1/3
C)   1/2
D)   3/4
E)   1/4F) A) and B)
G) All of the above

Question 17

The phenotype of an organism can be influenced by:

Accepted Answer

A)   its genotype.
B)   its environment.
C)   both its environment and its genotype.
D)   neither its genotype nor its environment.E) A) and B)
F) A) and C)

Question 18

The Law of Segregation states that:

Accepted Answer

A)   gene pairs assort independently of each other during gamete formation.
B)   differing characters in organisms result from two alleles that separate in gamete formation, such that each gamete gets only one of the two alleles.
C)   differing characters are the result of either the homozygous dominant or the homozygous recessive condition.
D)   phenotypes are always determined by genotypes.
E)   one allele of a pair must always be dominant and the other must always be recessive.F) B) and D)
G) C) and D)

Question 19

Characters such as height, weight, and skin color are controlled by many genes acting together. These are examples of:

Accepted Answer

A)   multiple alleles.
B)   codominance.
C)   incomplete dominance.
D)   polygenic inheritance.E) A) and D)
F) A) and C)

Question 20

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What are the different possible genotypes of the gametes produced by a plant that is heterozygous for both characters?

Accepted Answer

A)   All will be SsYy.
B)   Ss, Yy
C)   S, s, Y, y
D)   SY, Sy, sY, sy
E)   SY, syF) A) and B)
G) B) and D) D

Exam 11: The First Geneticist: Mendel and His Discoveries

Height is an example a character that displays continuous variation in humans. What is the reason for the range of heights in humans?

Correct Answer
verified

Mendel wanted to make sure his starting plants bred true, meaning the:

Correct Answer
verified
D

List two characteristics of the garden pea plant, Pisum sativum, that make it an ideal organism for genetic experiments.

Correct Answer
verified
It can be self-fertilized or cross-ferti...
View Answer

A true-breeding strain of red tulips is crossed to a true-breeding strain of white tulips. All the offspring have pink flowers. When a pink-flowered plant is self-fertilized, the offspring have red, pink, and white flowers, in the ratio 1:2:1. This type of inheritance is an example of ________.

Correct Answer
verified
incomplete...
View Answer

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What pea phenotype would be produced by the genotype SsYy?

Correct Answer
verified

A particular quality of an organism is referred to as a , each variation of which is a particular .

Correct Answer
verified

A and a are dominant and recessive alleles, respectively, of the same gene. Which genotype(s) would result in an individual with the dominant phenotype?

Correct Answer
verified
D

If an individual has genotype AaBb, how many different gametes can he or she produce? What combinations of alleles are possible?

Correct Answer
verified
The individual can p...
View Answer

Mendel crossed true-breeding pea plants and found the dominant trait always appeared in the F₁ generation, but it appeared in a ________ ratio of dominant to recessive in the F₂ generation.

Correct Answer
verified

If a person has a recessive trait, the genotype must be homozygous recessive for the trait.

Correct Answer
verified

In order to track the inheritance of a single character, you would need to do a:

Correct Answer
verified

What is the term for an observable trait of an organism?

Correct Answer
verified

Widow's-peak hairline in humans is dominant to non-widow's-peak hairline. If a person has a widow's-peak hairline, what is his or her genotype?

Correct Answer
verified

Correct Answer
verified

The Law of Independent Assortment states that:

Correct Answer
verified

Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. This couple also has a child who does not have CF. What is the probability the unaffected child is heterozygous?

Correct Answer
verified

The phenotype of an organism can be influenced by:

Correct Answer
verified

The Law of Segregation states that:

Correct Answer
verified

Characters such as height, weight, and skin color are controlled by many genes acting together. These are examples of:

Correct Answer
verified

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What are the different possible genotypes of the gametes produced by a plant that is heterozygous for both characters?

Correct Answer
verified
D

Exam 11: The First Geneticist: Mendel and His Discoveries

Height is an example a character that displays continuous variation in humans. What is the reason for the range of heights in humans?

Correct AnswerverifiedShow Answer

Mendel wanted to make sure his starting plants bred true, meaning the:

Correct AnswerverifiedD

List two characteristics of the garden pea plant, Pisum sativum, that make it an ideal organism for genetic experiments.

Correct AnswerverifiedIt can be self-fertilized or cross-ferti...View AnswerShow Answer

A true-breeding strain of red tulips is crossed to a true-breeding strain of white tulips. All the offspring have pink flowers. When a pink-flowered plant is self-fertilized, the offspring have red, pink, and white flowers, in the ratio 1:2:1. This type of inheritance is an example of ________.

Correct Answerverifiedincomplete...View AnswerShow Answer

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What pea phenotype would be produced by the genotype SsYy?

Correct AnswerverifiedShow Answer

A particular quality of an organism is referred to as a ________, each variation of which is a particular ________.

Correct AnswerverifiedShow Answer

A and a are dominant and recessive alleles, respectively, of the same gene. Which genotype(s) would result in an individual with the dominant phenotype?

Correct AnswerverifiedD

If an individual has genotype AaBb, how many different gametes can he or she produce? What combinations of alleles are possible?

Correct AnswerverifiedThe individual can p...View AnswerShow Answer

Mendel crossed true-breeding pea plants and found the dominant trait always appeared in the F1 generation, but it appeared in a ________ ratio of dominant to recessive in the F2 generation.

Correct AnswerverifiedShow Answer

If a person has a recessive trait, the genotype must be homozygous recessive for the trait.

Correct AnswerverifiedShow Answer

In order to track the inheritance of a single character, you would need to do a:

Correct AnswerverifiedShow Answer

What is the term for an observable trait of an organism?

Correct AnswerverifiedShow Answer

Widow's-peak hairline in humans is dominant to non-widow's-peak hairline. If a person has a widow's-peak hairline, what is his or her genotype?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The Law of Independent Assortment states that:

Correct AnswerverifiedShow Answer

Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. This couple also has a child who does not have CF. What is the probability the unaffected child is heterozygous?

Correct AnswerverifiedShow Answer

The phenotype of an organism can be influenced by:

Correct AnswerverifiedShow Answer

The Law of Segregation states that:

Correct AnswerverifiedShow Answer

Characters such as height, weight, and skin color are controlled by many genes acting together. These are examples of:

Correct AnswerverifiedShow Answer

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea. What are the different possible genotypes of the gametes produced by a plant that is heterozygous for both characters?

Correct AnswerverifiedD

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D

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It can be self-fertilized or cross-ferti...
View Answer

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View Answer

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verified

A particular quality of an organism is referred to as a , each variation of which is a particular .

Correct Answer
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verified
D

Correct Answer
verified
The individual can p...
View Answer

Mendel crossed true-breeding pea plants and found the dominant trait always appeared in the F₁ generation, but it appeared in a ________ ratio of dominant to recessive in the F₂ generation.

Correct Answer
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D