Question 1

Match each term with its correct definition.
-true breeding

Accepted Answer

A)  displayed traits are unchanged over multiple generations
B)  first generation of offspring from a parental cross
C)  true-breeding organisms used in the initial cross
D)  result of a cross between two first-generation organisms
E)  allele that is expressed no matter what other allele is presentF) allele that is expressed only if two identical copies are presentG) any organism with two identical copies of an alleleH) any organism with two different forms of an alleleI) F1 heterozygote (for a single trait) J) genetic makeup of an organismK) physical traits of an organismL) likelihood of something occurring if the occurrence is a matter of chanceM) organism that is heterozygous for two different traitsN) where an allele is found on a chromosomeO) when one allele cannot completely mask the effects of another alleleP) alleles at one locus mask the expression of alleles at a different locusQ) several different genes contribute to a particular phenotypeR) single allele has multiple phenotypic effectsS) None of the above
T) C) and P)

Question 2

There is no limit to the number of alleles that exist for a gene.

Accepted Answer

A) True 
 B)False

Question 3

Match the examples listed below to the following five types of allele interactions.
-Human blood type AB is an example of this allele interaction.

Accepted Answer

A)  dominance
B)  incomplete dominance
C)  codominance
D)  epistasis
E)  polygenic inheritanceF) A) and D)
G) D) and E)

Question 4

Match each term with its correct definition.
-homozygous

Accepted Answer

A)  displayed traits are unchanged over multiple generations
B)  first generation of offspring from a parental cross
C)  true-breeding organisms used in the initial cross
D)  result of a cross between two first-generation organisms
E)  allele that is expressed no matter what other allele is presentF) allele that is expressed only if two identical copies are presentG) any organism with two identical copies of an alleleH) any organism with two different forms of an alleleI) F1 heterozygote (for a single trait) J) genetic makeup of an organismK) physical traits of an organismL) likelihood of something occurring if the occurrence is a matter of chanceM) organism that is heterozygous for two different traitsN) where an allele is found on a chromosomeO) when one allele cannot completely mask the effects of another alleleP) alleles at one locus mask the expression of alleles at a different locusQ) several different genes contribute to a particular phenotypeR) single allele has multiple phenotypic effectsS) B) and Q)
T) I) and K)

Question 5

Suppose that your father is heterozygous for a recessive disorder. Also suppose that you know your mom has two "good" alleles. What is the probability that you will have the disorder?

Accepted Answer

A)   75%
B)   50%
C)   25%
D)   0%E) A) and C)
F) All of the above

Question 6

Mendel selected seven traits in pea plants to study. Why were his results relatively easy to interpret, even though he was examining seven distinct traits?

Accepted Answer

A)   All seven traits were easy to characterize.
B)   The seven alleles segregated independently from each other.
C)   Peas are easy to raise and have short life cycles.
D)   He knew enough mathematics to apply rules of probability to his results.E) A) and D)
F) A) and C)

Question 7

Human blood types follow which of the following inheritance patterns?

Accepted Answer

A)   dominance and codominance
B)   dominance and incomplete dominance
C)   codominance
D)   incomplete dominanceE) A) and B)
F) A) and C)

Question 8

Which of the following is one of Mendel's three hypotheses for explaining his observations?

Accepted Answer

A)   Adult plants always have traits that are governed by a single pair of alleles, but the number of possible alleles varies with each trait.
B)   The pairs of alleles remain together in the formation of gametes so that each gamete gets both alleles.
C)   Adult plants carry a trio of genes that will determine the inheritance of each allele.
D)   If an adult plant has two different alleles, the alleles blend.E) C) and D)
F) All of the above

Question 9

In snapdragons the red allele CR is incompletely dominant over the white allele CW. If you were to cross two pink snapdragons, what percentage of the progeny will be pink?

Accepted Answer

A)   0%
B)   25%
C)   50%
D)   100%E) A) and B)
F) A) and C)

Question 10

Who established the connection between genes, meiosis, and fertilization?

Accepted Answer

A)   Erich von Tschermak
B)   Walter Sutton
C)   Hugo de Vries
D)   Gregor MendelE) A) and B)
F) A) and D)

Question 11

Define epistasis and give an example.

Accepted Answer

Epistasis is where one set of genes will...

Question 12

Suppose that both of your parents have Huntington's disease, which is caused by a dominant allele, and are both heterozygous for the disease. What are the odds of you having the disorder?

Accepted Answer

A)   100%
B)   75%
C)   50%
D)   25%E) A) and C)
F) B) and C)

Question 13

Skin colour in humans is caused by polygenic inheritance. Which one of the following statements is implied by this form of inheritance?

Accepted Answer

A)   The skin colour of children will always be identical to one parent or the other.
B)   The skin colour of children will always be intermediate to that of their parents.
C)   The skin colour of children will most often be identical to that of one of their parents, but sometimes not.
D)   The skin colour of children will most often be intermediate to that of their parents, but sometimes not.E) A) and B)
F) All of the above

Question 14

Suppose that your mother and father are both healthy but carry the allele for cystic fibrosis, which is caused by a recessive allele. What are the odds of you having at least one allele for the disorder?

Accepted Answer

A)   1 in 4
B)   1 in 2
C)   3 in 4
D)   1E) B) and D)
F) A) and D)

Question 15

Suppose that R is the dominant allele for a round pea, and r is the recessive allele for a wrinkled pea. Suppose also that you cross plants having round peas with plants having wrinkled peas. Which of the following is the most likely result?

Accepted Answer

A)   The offspring will be neither round nor wrinkled.
B)   The offspring will be mostly wrinkled.
C)   The offspring will all be wrinkled.
D)   The offspring will all be round.E) A) and B)
F) A) and C)

Question 16

Suppose that a patient presents the following symptoms: anemia, dilation of heart, lung damage and pneumonia, rheumatism, abdominal pain, and kidney failure. After learning about the patient's family history, which disorder did the doctor run a genetic test for?

Accepted Answer

A)   cystic fibrosis
B)   albinism
C)   sickle cell disease
D)   achondroplasiaE) A) and B)
F) A) and C)

Question 17

Mendel knew about and understood incomplete dominance.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is a result of an incomplete dominance?

Accepted Answer

A)   orange carnations
B)   white carnations
C)   pink carnations
D)   red carnationsE) A) and D)
F) All of the above

Question 19

Match each term with its correct definition.
-pleiotropy

Accepted Answer

A)  displayed traits are unchanged over multiple generations
B)  first generation of offspring from a parental cross
C)  true-breeding organisms used in the initial cross
D)  result of a cross between two first-generation organisms
E)  allele that is expressed no matter what other allele is presentF) allele that is expressed only if two identical copies are presentG) any organism with two identical copies of an alleleH) any organism with two different forms of an alleleI) F1 heterozygote (for a single trait) J) genetic makeup of an organismK) physical traits of an organismL) likelihood of something occurring if the occurrence is a matter of chanceM) organism that is heterozygous for two different traitsN) where an allele is found on a chromosomeO) when one allele cannot completely mask the effects of another alleleP) alleles at one locus mask the expression of alleles at a different locusQ) several different genes contribute to a particular phenotypeR) single allele has multiple phenotypic effectsS) D) and K)
T) I) and P)

Question 20

Match each term with its correct definition.
-F2 generation

Accepted Answer

A)  displayed traits are unchanged over multiple generations
B)  first generation of offspring from a parental cross
C)  true-breeding organisms used in the initial cross
D)  result of a cross between two first-generation organisms
E)  allele that is expressed no matter what other allele is presentF) allele that is expressed only if two identical copies are presentG) any organism with two identical copies of an alleleH) any organism with two different forms of an alleleI) F1 heterozygote (for a single trait) J) genetic makeup of an organismK) physical traits of an organismL) likelihood of something occurring if the occurrence is a matter of chanceM) organism that is heterozygous for two different traitsN) where an allele is found on a chromosomeO) when one allele cannot completely mask the effects of another alleleP) alleles at one locus mask the expression of alleles at a different locusQ) several different genes contribute to a particular phenotypeR) single allele has multiple phenotypic effectsS) A) and D)
T) H) and Q)

Exam 9: The Chromosomal Basis of Mendelian Inheritance

Match the examples listed below to the following five types of allele interactions. -Human blood type AB is an example of this allele interaction.

Correct AnswerverifiedShow Answer

Skin colour in humans is caused by polygenic inheritance. Which one of the following statements is implied by this form of inheritance?

Correct AnswerverifiedShow Answer

Which of the following is one of Mendel's three hypotheses for explaining his observations?

Correct AnswerverifiedShow Answer

Human blood types follow which of the following inheritance patterns?

Correct AnswerverifiedShow Answer

Who established the connection between genes, meiosis, and fertilization?

Correct AnswerverifiedShow Answer

Suppose that your mother and father are both healthy but carry the allele for cystic fibrosis, which is caused by a recessive allele. What are the odds of you having at least one allele for the disorder?

Correct AnswerverifiedShow Answer

Match each term with its correct definition. -pleiotropy

Correct AnswerverifiedShow Answer

There is no limit to the number of alleles that exist for a gene.

Correct AnswerverifiedShow Answer

Match each term with its correct definition. -F2 generation

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Suppose that a patient presents the following symptoms: anemia, dilation of heart, lung damage and pneumonia, rheumatism, abdominal pain, and kidney failure. After learning about the patient's family history, which disorder did the doctor run a genetic test for?

Correct AnswerverifiedShow Answer

Mendel knew about and understood incomplete dominance.

Correct AnswerverifiedShow Answer

Match each term with its correct definition. -homozygous

Correct AnswerverifiedShow Answer

Suppose that your father is heterozygous for a recessive disorder. Also suppose that you know your mom has two "good" alleles. What is the probability that you will have the disorder?

Correct AnswerverifiedShow Answer

Which of the following is a result of an incomplete dominance?

Correct AnswerverifiedShow Answer

In snapdragons the red allele CR is incompletely dominant over the white allele CW. If you were to cross two pink snapdragons, what percentage of the progeny will be pink?

Correct AnswerverifiedShow Answer

Mendel selected seven traits in pea plants to study. Why were his results relatively easy to interpret, even though he was examining seven distinct traits?

Correct AnswerverifiedShow Answer

Suppose that R is the dominant allele for a round pea, and r is the recessive allele for a wrinkled pea. Suppose also that you cross plants having round peas with plants having wrinkled peas. Which of the following is the most likely result?

Correct AnswerverifiedShow Answer

Suppose that both of your parents have Huntington's disease, which is caused by a dominant allele, and are both heterozygous for the disease. What are the odds of you having the disorder?

Correct AnswerverifiedShow Answer

Define epistasis and give an example.

Correct AnswerverifiedEpistasis is where one set of genes will...View AnswerShow Answer

Match each term with its correct definition. -true breeding

Correct AnswerverifiedShow Answer

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Match each term with its correct definition. -F₂ generation

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In snapdragons the red allele C^R is incompletely dominant over the white allele C^W. If you were to cross two pink snapdragons, what percentage of the progeny will be pink?

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Epistasis is where one set of genes will...
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