Question 1

What is the blending theory of inheritance?

Accepted Answer

A)  Mendel's theory of how the traits of parents are passed to offspring through the gametes
B)  Darwin's theory of how traits are passed from all parts of the parent's body into the gamete to be transmitted to the offspring
C)  The modern theory of how genetic information is passed from parents to offspring
D)  An old theory that said that offspring show traits intermediate between those of the parents

Question 2

Since each child of two heterozygous parents has a 50% chance of receiving a recessive trait from each parent,

Accepted Answer

A)  if the first child is phenotypically recessive,then the next child must be phenotypically dominant.
B)  if the first child is phenotypically recessive,then the next child has a 3/4 chance of being phenotypically recessive.
C)  if the first child is phenotypically recessive,then the next child has a 1/2 chance of being phenotypically recessive.
D)  no matter what the first child's phenotype,the next child will have a 1/4 chance of being phenotypically recessive. D

Question 3

In 1940,two researchers named Weiner and Landsteiner discovered that about 85 percent of the human population sampled possessed a blood cell protein that had been previously detected in Rhesus monkeys.This blood type was labeled Rh positive,and Rh+ was found to be dominant over the absence of the blood factor (Rh) .Under normal Mendelian inheritance,which of the following statements is FALSE?

Accepted Answer

A)  Two Rh+ parents could have an Rh- child.
B)  Two Rh- parents could have an Rh+ child.
C)  An Rh- child would require that both parents be carriers of at least one Rh- gene.
D)  It is possible with just one pair of parents to have children where some siblings are Rh- and some are Rh+.
E)  All of the choices are false.

Question 4

Cystic fibrosis and Niemann-Pick Disease are common autosomal dominant disorders.

Accepted Answer

A) True 
 B)False

Question 5

The particulate theory of inheritance

Accepted Answer

A)  preceded Mendel's research by a century.
B)  was proposed by Mendel.
C)  is based on particles or hereditary units we now call genes.
D)  All of the choices are correct.
E)  Two of the above.

Question 6

Which allele combination represents a homozygous dominant individual?

Accepted Answer

A)  AA
B)  Aa
C)  aa
D)  none of these are homozygous dominant individuals A

Question 7

If black fur is produced by a recessive allele,which genotype is most likely to produce a black individual?

Accepted Answer

A)  bb
B)  BB
C)  Bb
D)  Cb

Question 8

If an individual is heterozygous for a particular trait,the gametes that individual produces will contain 3/4 dominant and 1/4 recessive alleles.

Accepted Answer

A) True 
 B)False

Question 9

Which characteristic of pea plants were important in their selection as Mendel's research organism?

Accepted Answer

A)  Peas are easy to cultivate.
B)  Pea plants have a short generation time.
C)  Pea plants are self-pollinating but can be cross-fertilized easily.
D)  Many true-breeding varieties were available.
E)  All of the above were important characteristics in Mendel's selection.

Question 10

The F2 offspring of a classic Mendelian monohybrid cross between homozygous dominant and homozygous recessive parents would produce the genotype(s)

Accepted Answer

A)  AA and Aa.
B)  Aa and aa.
C)  AA,Aa,and aa.
D)  AA only.
E)  Aa only.

Question 11

When a round fruit plant is crossed with a long fruit plant their offspring are oval.What is the best explanation for this scenario?

Accepted Answer

A)  pleiotropic inheritance
B)  polygenic inheritance
C)  incomplete dominance
D)  X-linked inheritance C

Question 12

The ability to roll the edges of the tongue upward in a U-shape has been considered to be an inherited ability.The standard assumption is that tongue-rolling is a dominant allele at a single gene locus.Which of the following would cast doubt on this assumption?

Accepted Answer

A)  A teacher reports that after testing her class on the ability to roll their tongue,with very little effort the non-tongue-rollers can learn to also roll their tongues.
B)  A student who can roll his tongue has a mother and father,both of whom cannot.
C)  A student who cannot roll his tongue has a mother and father,both of whom can.
D)  Two of the above are situations that would cast doubt on this assumption.

Question 13

What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?

Accepted Answer

A)  He was a monk.
B)  He was a teacher.
C)  He lived in Austria.
D)  He had studied mathematics and probability.
E)  He corresponded with Charles Darwin.

Question 14

Some plants fail to produce chlorophyll,and this trait appears to be recessive.Many plants also self-pollinate.If we locate a pea plant that is heterozygous for this trait,self-pollinate it and harvest seeds,what are the likely phenotypes of these seeds when they germinate?

Accepted Answer

A)  All will be green with chlorophyll since that is the dominant trait.
B)  All will be white and lack chlorophyll since this is self-pollinated.
C)  About one-half will be green and one-half white since that is the distribution of the genes in the parents.
D)  About one-fourth will be white and three-fourths green since it is similar to a monohybrid cross between heterozygotes.
E)  About one-fourth will be green and three-fourths white since it is similar to a monohybrid cross between heterozygotes.

Question 15

Haiti is settled by peoples of both African and European ancestry.A young couple,both with mixed ancestry,marry and have several children.The children vary widely in the amount of skin melanin production,with one child being lighter than both parents,and one being darker.The simple explanation for this is

Accepted Answer

A)  epistasis.
B)  multiple alleles are available for the one chromosomal locus that governs skin color.
C)  the environment affected the phenotype that developed.
D)  polygenic inheritance.
E)  gene linkage.

Question 16

Which of the following is not part of Mendel's law of segregation?

Accepted Answer

A)  Each individual has two factors for each trait.
B)  The factors segregate during Meiosis.
C)  Each gamete will contain two factors for a trait.
D)  Fertilization gives the offspring two factors for each trait.

Question 17

Computer simulations are sometimes used to demonstrate the outcome of monohybrid fruit fly crosses,where a student can run generation after generation of fruit flies with 100 offspring produced each generation,half male and half female,and a 3-to-1 phenotype ratio (or 75 to 25) in the F1 generation.Compared with real genetics results,

Accepted Answer

A)  rarely would exactly 100 fly offspring be produced or survive.
B)  an exact balance between males and females would be rare.
C)  a precise 3-to-1 ratio would be uncommon.
D)  All of the choices are true.

Question 18

Which of the following is NOT a trait that is the result of,or is affected by,the interaction of more than one gene?

Accepted Answer

A)  human skin color
B)  cleft palate
C)  height
D)  sickle cell anemia

Question 19

The offspring of a monohybrid testcross would have what possible genotype(s) ?

Accepted Answer

A)  AA and Aa.
B)  Aa and aa.
C)  AA,Aa,and aa.
D)  AA only.
E)  aa only.

Question 20

Which statement about the blending concept of inheritance is correct?

Accepted Answer

A)  A cross between a tall man and a short woman would always produce children of medium height.
B)  A cross between a tall man and a short woman can produce some children that are tall while others are short.
C)  A cross between a tall man and a short woman produce tall children who can then produce short grandchildren.
D)  Genetic material is unstable which accounts for such a wide diversity in our offspring.

Exam 11: Mendelian Patterns of Inheritance

What is the blending theory of inheritance?

Correct Answer
verified

Since each child of two heterozygous parents has a 50% chance of receiving a recessive trait from each parent,

Correct Answer
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D

Correct Answer
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Cystic fibrosis and Niemann-Pick Disease are common autosomal dominant disorders.

Correct Answer
verified

The particulate theory of inheritance

Correct Answer
verified

Which allele combination represents a homozygous dominant individual?

Correct Answer
verified
A

If black fur is produced by a recessive allele,which genotype is most likely to produce a black individual?

Correct Answer
verified

If an individual is heterozygous for a particular trait,the gametes that individual produces will contain 3/4 dominant and 1/4 recessive alleles.

Correct Answer
verified

Which characteristic of pea plants were important in their selection as Mendel's research organism?

Correct Answer
verified

The F₂ offspring of a classic Mendelian monohybrid cross between homozygous dominant and homozygous recessive parents would produce the genotype(s)

Correct Answer
verified

When a round fruit plant is crossed with a long fruit plant their offspring are oval.What is the best explanation for this scenario?

Correct Answer
verified
C

The ability to roll the edges of the tongue upward in a U-shape has been considered to be an inherited ability.The standard assumption is that tongue-rolling is a dominant allele at a single gene locus.Which of the following would cast doubt on this assumption?

Correct Answer
verified

What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?

Correct Answer
verified

Some plants fail to produce chlorophyll,and this trait appears to be recessive.Many plants also self-pollinate.If we locate a pea plant that is heterozygous for this trait,self-pollinate it and harvest seeds,what are the likely phenotypes of these seeds when they germinate?

Correct Answer
verified

Correct Answer
verified

Which of the following is not part of Mendel's law of segregation?

Correct Answer
verified

Correct Answer
verified

Which of the following is NOT a trait that is the result of,or is affected by,the interaction of more than one gene?

Correct Answer
verified

The offspring of a monohybrid testcross would have what possible genotype(s) ?

Correct Answer
verified

Which statement about the blending concept of inheritance is correct?

Correct Answer
verified

Exam 11: Mendelian Patterns of Inheritance

What is the blending theory of inheritance?

Correct AnswerverifiedShow Answer

Since each child of two heterozygous parents has a 50% chance of receiving a recessive trait from each parent,

Correct AnswerverifiedD

Correct AnswerverifiedShow Answer

Cystic fibrosis and Niemann-Pick Disease are common autosomal dominant disorders.

Correct AnswerverifiedShow Answer

The particulate theory of inheritance

Correct AnswerverifiedShow Answer

Which allele combination represents a homozygous dominant individual?

Correct AnswerverifiedA

If black fur is produced by a recessive allele,which genotype is most likely to produce a black individual?

Correct AnswerverifiedShow Answer

If an individual is heterozygous for a particular trait,the gametes that individual produces will contain 3/4 dominant and 1/4 recessive alleles.

Correct AnswerverifiedShow Answer

Which characteristic of pea plants were important in their selection as Mendel's research organism?

Correct AnswerverifiedShow Answer

The F2 offspring of a classic Mendelian monohybrid cross between homozygous dominant and homozygous recessive parents would produce the genotype(s)

Correct AnswerverifiedShow Answer

When a round fruit plant is crossed with a long fruit plant their offspring are oval.What is the best explanation for this scenario?

Correct AnswerverifiedC

The ability to roll the edges of the tongue upward in a U-shape has been considered to be an inherited ability.The standard assumption is that tongue-rolling is a dominant allele at a single gene locus.Which of the following would cast doubt on this assumption?

Correct AnswerverifiedShow Answer

What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?

Correct AnswerverifiedShow Answer

Some plants fail to produce chlorophyll,and this trait appears to be recessive.Many plants also self-pollinate.If we locate a pea plant that is heterozygous for this trait,self-pollinate it and harvest seeds,what are the likely phenotypes of these seeds when they germinate?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is not part of Mendel's law of segregation?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is NOT a trait that is the result of,or is affected by,the interaction of more than one gene?

Correct AnswerverifiedShow Answer

The offspring of a monohybrid testcross would have what possible genotype(s) ?

Correct AnswerverifiedShow Answer

Which statement about the blending concept of inheritance is correct?

Correct AnswerverifiedShow Answer

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D

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A

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The F₂ offspring of a classic Mendelian monohybrid cross between homozygous dominant and homozygous recessive parents would produce the genotype(s)

Correct Answer
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Correct Answer
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C

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