Question 1

Red-green colorblindness is a recessive X-linked trait.If a female is red-green colorblind,which of the following is TRUE?

Accepted Answer

A)  Her mother must be colorblind. 
B)  Both her parents must be colorblind. 
C)  Both her parents are carriers of the recessive allele. 
D)  Her father must be colorblind. 
E)  Women cannot exhibit red-green colorblindness because they have two X chromosomes. 
A)  Her mother must be colorblind. 
B)  Both her parents must be colorblind. 
C)  Both her parents are carriers of the recessive allele. 
D)  Her father must be colorblind. 
E)  Women cannot exhibit red-green colorblindness because they have two X chromosomes.

Question 2

Which of the following is NOT a correct match?

Accepted Answer

A)  physical expression of a trait - phenotype 
B)  allele that masks the expression of an alternate allele - dominant 
C)  identical alleles - heterozygous 
D)  allele whose expression can be masked by an alternate allele - recessive 
E)  the specific alleles that an individual has - genotype 
A)  physical expression of a trait - phenotype 
B)  allele that masks the expression of an alternate allele - dominant 
C)  identical alleles - heterozygous 
D)  allele whose expression can be masked by an alternate allele - recessive 
E)  the specific alleles that an individual has - genotype

Question 3

If an individual expresses a dominant disease,which of the following is true?

Accepted Answer

A)  All of his children will always inherit the disease. 
B)  He will pass this disease to all of his daughters. 
C)  There is at least a 50% probability that his children will inherit the disease. 
D)  There is a 100% possibility that his sons will inherit this disease. 
E)  None of his children will inherit the disease unless his wife also has the disease. 
A)  All of his children will always inherit the disease. 
B)  He will pass this disease to all of his daughters. 
C)  There is at least a 50% probability that his children will inherit the disease. 
D)  There is a 100% possibility that his sons will inherit this disease. 
E)  None of his children will inherit the disease unless his wife also has the disease.

Question 4

Which genetic disorder is associated with an irregular shape of the red blood cells?

Accepted Answer

A)  Sickle cell disease 
B)  Marfan syndrome 
C)  Huntington disease 
D)  Phenylketonuria (PKU) 
E)  Cystic fibrosis (CF) 
A)  Sickle cell disease 
B)  Marfan syndrome 
C)  Huntington disease 
D)  Phenylketonuria (PKU) 
E)  Cystic fibrosis (CF)

Question 5

Which of the following is an example of a phenotype?

Accepted Answer

A)  AAGg 
B)  freckles 
C)  AA 
D)  Ag 
E)  Gg 
A)  AAGg 
B)  freckles 
C)  AA 
D)  Ag 
E)  Gg

Question 6

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele.What is the most effective way for Morgan verify this statement?

Accepted Answer

A)  Breed the snake with a heterozygous female. 
B)  Breed the snake with a homozygous normal female. 
C)  Breed the snake with a female sibling. 
D)  Breed the snake with a homozygous recessive albino female. 
E)  He can breed the snake with any female and a portion of the offspring will always be albino. 
A)  Breed the snake with a heterozygous female. 
B)  Breed the snake with a homozygous normal female. 
C)  Breed the snake with a female sibling. 
D)  Breed the snake with a homozygous recessive albino female. 
E)  He can breed the snake with any female and a portion of the offspring will always be albino.

Question 7

Skin color is coded for by several different genes which results in a range of skin colors from very dark to very light.This is an example of

Accepted Answer

A)  a multifactorial trait. 
B)  polygenic inheritance. 
C)  pleiotropy. 
D)  codominance. 
E)  incomplete dominance. 
A)  a multifactorial trait. 
B)  polygenic inheritance. 
C)  pleiotropy. 
D)  codominance. 
E)  incomplete dominance.

Question 8

A cow with black and white patches is produced from a white bull and a black cow.This is an example of

Accepted Answer

A)  incomplete dominance. 
B)  codominance. 
C)  dominance/recessive trait. 
D)  polygenic. 
E)  pleiotropy. 
A)  incomplete dominance. 
B)  codominance. 
C)  dominance/recessive trait. 
D)  polygenic. 
E)  pleiotropy.

Question 9

What type of disorder is hemophilia classified as?

Accepted Answer

A)  sex-linked recessive 
B)  sex-linked dominant 
C)  co-dominance 
D)  polygenic 
E)  pleiotropic 
A)  sex-linked recessive 
B)  sex-linked dominant 
C)  co-dominance 
D)  polygenic 
E)  pleiotropic

Question 10

The filled-in squares of a Punnett square represent

Accepted Answer

A)  the numbers of individuals with each version of a trait. 
B)  all possible combinations of gametes based on a cross between the two parents. 
C)  an exact ratio that must always occur when the same parents have 4 offspring. 
D)  examples of some of the offspring that can arise from a one-trait cross. 
E)  the gametes from one parent. 
A)  the numbers of individuals with each version of a trait. 
B)  all possible combinations of gametes based on a cross between the two parents. 
C)  an exact ratio that must always occur when the same parents have 4 offspring. 
D)  examples of some of the offspring that can arise from a one-trait cross. 
E)  the gametes from one parent.

Question 11

If a homozygous black bull is mated with a homozygous white cow and the calf is gray,this would be an example of ___________.However,if the calf has black and white spots this would be an example of

Accepted Answer

A)  incomplete dominance; a sex-linked trait. 
B)  complete dominance; polygenic trait. 
C)  codominance; homology. 
D)  incomplete dominance; codominance. 
E)  a sex-linked trait; a recessive trait. 
A)  incomplete dominance; a sex-linked trait. 
B)  complete dominance; polygenic trait. 
C)  codominance; homology. 
D)  incomplete dominance; codominance. 
E)  a sex-linked trait; a recessive trait.

Question 12

Which of the following is NOT true with regard to the law of segregation?

Accepted Answer

A)  Each individual has 2 factors for each trait. 
B)  Genes segregate during gamete formation. 
C)  Gametes contain only 1 gene from each pair. 
D)  During fertilization, each new individual obtains 2 genes for each trait. 
E)  Each gamete contains 2 genes for each trait. 
A)  Each individual has 2 factors for each trait. 
B)  Genes segregate during gamete formation. 
C)  Gametes contain only 1 gene from each pair. 
D)  During fertilization, each new individual obtains 2 genes for each trait. 
E)  Each gamete contains 2 genes for each trait.

Question 13

Which is NOT true according to Mendel's law and meiosis?

Accepted Answer

A)  One factor must be dominant and one factor recessive in each individual. 
B)  Each individual contains two factors for each trait. 
C)  Factors separate from each other during gamete formation. 
D)  Each gamete contains one copy of each factor. 
E)  Fertilization restores the presence of two factors. 
A)  One factor must be dominant and one factor recessive in each individual. 
B)  Each individual contains two factors for each trait. 
C)  Factors separate from each other during gamete formation. 
D)  Each gamete contains one copy of each factor. 
E)  Fertilization restores the presence of two factors.

Question 14

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele.Morgan mates the snake with an albino female and four normally pigmented offspring are produced.Morgan rushes back to the snake dealer and demands his money back stating that the male he bought is not heterozygous for the albino allele because all of its offspring had normal pigmentation.

Accepted Answer

A)  True because according to the laws of probability, at least one of the offspring should have been an albino. 
B)  True because 50% of all offspring produced must be albino. 
C)  False because for each offspring there is a 50% chance that it will have normal pigmentation. 
D)  False because a heterozygous male will only pass the dominant allele to its offspring. 
E)  True because if at least one parent is homozygous recessive, at least one of their offspring must also show the recessive trait. 
A)  True because according to the laws of probability, at least one of the offspring should have been an albino. 
B)  True because 50% of all offspring produced must be albino. 
C)  False because for each offspring there is a 50% chance that it will have normal pigmentation. 
D)  False because a heterozygous male will only pass the dominant allele to its offspring. 
E)  True because if at least one parent is homozygous recessive, at least one of their offspring must also show the recessive trait.

Question 15

In a monohybrid cross,how many traits are examined?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 16

Alleles A,B,and C are found on the same chromosome with alleles a,b,and c on the homologous chromosome.If alleles A and C on one homologous chromosome,and a and c on the other homologous chromosome are typically inherited together,this suggests that

Accepted Answer

A) A and C alleles are closer together than the a and c alleles. 
B) the order of the alleles on one homologous chromosome is A,B,C. 
C) alleles a and c are closer together than alleles c and b. 
D) a recombinant gamete would contain alleles A,B,and C. 
E) crossing over often occurs between sister chromatids. 
A) A and C alleles are closer together than the a and c alleles. 
B) the order of the alleles on one homologous chromosome is A,B,C. 
C) alleles a and c are closer together than alleles c and b. 
D) a recombinant gamete would contain alleles A,B,and C. 
E) crossing over often occurs between sister chromatids.

Question 17

A red-eyed male Drosophila mates with a red-eyed female Drosophila.One of the female's parents had white eyes.What proportion of the male offspring will have white eyes?

Accepted Answer

A)  0% 
B)  25% 
C)  50% 
D)  75% 
E)  100% 
A)  0% 
B)  25% 
C)  50% 
D)  75% 
E)  100%

Question 18

A blue-eyed,left-handed woman marries a brown-eyed,right-handed man who is heterozygous for both of his traits.If blue eyes and left-handedness are recessive,how many different phenotypes are possible in their children?

Accepted Answer

A)  four 
B)  three 
C)  two 
D)  one 
E)  five 
A)  four 
B)  three 
C)  two 
D)  one 
E)  five

Question 19

How many different gametes can be produced from the genotype AaBBDDEeff?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
E)  16 
A)  1 
B)  2 
C)  4 
D)  8 
E)  16

Question 20

Vitamin-D resistant rickets is a sex-linked dominant trait,which leads to softening of the bones which can cause fractures and deformities.Rickets is often due to a deficiency of vitamin D,however,with vitamin-D resistant rickets,ingestion of vitamin D is ineffective.Maria's mother is normal and does not display any symptoms of this disease; however,Maria's father has the disease.Maria marries a man that does not have the disease.What is the probability that they will have a daughter that has the disease?

Accepted Answer

A)  0% 
B)  25% 
C)  50% 
D)  75% 
E)  100% 
A)  0% 
B)  25% 
C)  50% 
D)  75% 
E)  100%

Exam 10: Patterns of Inheritance

Red-green colorblindness is a recessive X-linked trait.If a female is red-green colorblind,which of the following is TRUE?

Which of the following is NOT a correct match?

If an individual expresses a dominant disease,which of the following is true?

Which genetic disorder is associated with an irregular shape of the red blood cells?

Which of the following is an example of a phenotype?

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele.What is the most effective way for Morgan verify this statement?

Skin color is coded for by several different genes which results in a range of skin colors from very dark to very light.This is an example of

A cow with black and white patches is produced from a white bull and a black cow.This is an example of

What type of disorder is hemophilia classified as?

The filled-in squares of a Punnett square represent

If a homozygous black bull is mated with a homozygous white cow and the calf is gray,this would be an example of ___________.However,if the calf has black and white spots this would be an example of

Which of the following is NOT true with regard to the law of segregation?

Which is NOT true according to Mendel's law and meiosis?

In a monohybrid cross,how many traits are examined?

Alleles A,B,and C are found on the same chromosome with alleles a,b,and c on the homologous chromosome.If alleles A and C on one homologous chromosome,and a and c on the other homologous chromosome are typically inherited together,this suggests that

A red-eyed male Drosophila mates with a red-eyed female Drosophila.One of the female's parents had white eyes.What proportion of the male offspring will have white eyes?

A blue-eyed,left-handed woman marries a brown-eyed,right-handed man who is heterozygous for both of his traits.If blue eyes and left-handedness are recessive,how many different phenotypes are possible in their children?

How many different gametes can be produced from the genotype AaBBDDEeff?

Biology: The Science of Life

The Chemical Basis of Life

The Organic Molecules of Life

Inside the Cell

The Dynamic Cell

Energy for Life

Energy for Cells

Cellular Reproduction

Meiosis and the Genetic Basis of Sexual Reproduction

DNA Biology

Biotechnology and Genomics

Genetic Counseling

Darwin and Evolution

Evolution on a Small Scale

Evolution on a Large Scale

The Microorganisms: Viruses, bacteria, and Protists

Land Environment: Plants and Fungi

Both Water and Land: Animals

Plant Anatomy and Growth

Plant Responses and Reproduction

Being Organized and Steady

The Transport Systems

The Maintenance Systems

Human Nutrition

Defenses Against Disease

The Control Systems

Sensory Input and Motor Output

Reproduction and Embryonic Development

Ecology and Populations

Communities and Ecosystems

Human Impact on the Biosphere

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