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

Morgan breeds and sells snakes.He knows that he can make the most money by breeding and selling albino snakes.Albinism is a recessive trait.His female albino corn snake just produced six offspring.Two displayed normal coloration and four were albino.What is the chance that another offspring produced by the same parents will be albino?

Accepted Answer

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

Question 3

If the parental genotype is EeWw what are the potential allele combinations that could occur at the end of Meiosis?

Accepted Answer

A)  EW, Ew, eW, and ew 
B)  EW, EE, eW, and ww 
C)  WW, Ew, EW, and ew 
D)  EE, WW, ee, and ww 
E)  EW, Ew, ee and ww 
A)  EW, Ew, eW, and ew 
B)  EW, EE, eW, and ww 
C)  WW, Ew, EW, and ew 
D)  EE, WW, ee, and ww 
E)  EW, Ew, ee and ww

Question 4

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 son 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%

Question 5

Ryan has type A blood and is color-blind (an X-linked recessive trait).Which of the following combinations are possible for his parents?

Accepted Answer

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

Question 6

A male is always homozygous for a trait that is

Accepted Answer

A)  codominant. 
B)  X-linked. 
C)  autosomal. 
D)  dominant. 
E)  dihybrid. 
A)  codominant. 
B)  X-linked. 
C)  autosomal. 
D)  dominant. 
E)  dihybrid.

Question 7

Linked genes

Accepted Answer

A)  always assort independently. 
B)  undergo crossing over of sister chromatids at a high rate. 
C)  are found on homologous chromosomes. 
D)  never cross over during prophase I. 
E)  tend to be close together on a single chromosome. 
A)  always assort independently. 
B)  undergo crossing over of sister chromatids at a high rate. 
C)  are found on homologous chromosomes. 
D)  never cross over during prophase I. 
E)  tend to be close together on a single chromosome.

Question 8

What type of disorder is muscular dystrophy classified as?

Accepted Answer

A)  sex-linked recessive 
B)  sex-linked dominant 
C)  codominance 
D)  pleiotropic 
E)  polygenic inheritance 
A)  sex-linked recessive 
B)  sex-linked dominant 
C)  codominance 
D)  pleiotropic 
E)  polygenic inheritance

Question 9

If both parents express a particular trait,but their child does not,what does this indicate about the trait?

Accepted Answer

A)  The trait is an autosomal dominant trait. 
B)  The trait is an autosomal recessive trait. 
C)  The trait is sex-linked recessive. 
D)  The trait is sex-linked dominant. 
E)  This is a lethal trait. 
A)  The trait is an autosomal dominant trait. 
B)  The trait is an autosomal recessive trait. 
C)  The trait is sex-linked recessive. 
D)  The trait is sex-linked dominant. 
E)  This is a lethal trait.

Question 10

Which variable will determine the coat color in Himalayan rabbits?

Accepted Answer

A)  the genetics will determine it 100% 
B)  the environment will determine it 100% 
C)  both the genetics and environment will determine the coat color 
D)  neither the environment or genes will play a role in determining coat color 
A)  the genetics will determine it 100% 
B)  the environment will determine it 100% 
C)  both the genetics and environment will determine the coat color 
D)  neither the environment or genes will play a role in determining coat color

Question 11

Which of the following is a sex-linked recessive disorder?

Accepted Answer

A)  color blindness 
B)  Marfan syndrome 
C)  sickle-cell disease 
D)  cystic fibrosis 
E)  alkaptonuria 
A)  color blindness 
B)  Marfan syndrome 
C)  sickle-cell disease 
D)  cystic fibrosis 
E)  alkaptonuria

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?

If the parental genotype is EeWw what are the potential allele combinations that could occur at the end of Meiosis?

Ryan has type A blood and is color-blind (an X-linked recessive trait).Which of the following combinations are possible for his parents?

A male is always homozygous for a trait that is

Linked genes

What type of disorder is muscular dystrophy classified as?

If both parents express a particular trait,but their child does not,what does this indicate about the trait?

Which variable will determine the coat color in Himalayan rabbits?

Which of the following is a sex-linked recessive disorder?

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

Filters