Question 1

If a child has an AB blood type, the parents

Accepted Answer

A)  must both have different blood types. 
B)  must be A and B, but not AB. 
C)  must be AB. 
D)  can be any blood type. 
E)  can have different blood types, but neither can be O. 
A)  must both have different blood types. 
B)  must be A and B, but not AB. 
C)  must be AB. 
D)  can be any blood type. 
E)  can have different blood types, but neither can be O.

Question 2

If a pure-breeding wired-hair terrier ( WW ) is crossed with a pure-breeding smooth-hair terrier  (ww), and a puppy with a wavy hair is produced, the simplest explanation is

Accepted Answer

A)  a mutation. 
B)  an X-linked gene. 
C)  an incompletely dominant gene. 
D)  a lethal gene. 
E)  codominance. 
A)  a mutation. 
B)  an X-linked gene. 
C)  an incompletely dominant gene. 
D)  a lethal gene. 
E)  codominance.

Question 3

In a pedigree chart, a male who does NOT demonstrate the trait being studied is represented by

Accepted Answer

A)  a darkened square. 
B)  a darkened diamond. 
C)  a clear circle. 
D)  a clear square. 
E)  a darkened circle. 
A)  a darkened square. 
B)  a darkened diamond. 
C)  a clear circle. 
D)  a clear square. 
E)  a darkened circle.

Question 4

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Accepted Answer

A)  50 percent. 
B)  0 percent. 
C)  100 percent. 
D)  25 percent. 
E)  75 percent. 
A)  50 percent. 
B)  0 percent. 
C)  100 percent. 
D)  25 percent. 
E)  75 percent.

Question 5

Gene A occurs on chromosome #5; gene B occurs on chromosome #21. Therefore, these two portions of the chromosome CANNOT be

Accepted Answer

A)  homologous. 
B)  in the same individual. 
C)  homozygous. 
D)  alleles. 
E)  recessive. 
A)  homologous. 
B)  in the same individual. 
C)  homozygous. 
D)  alleles. 
E)  recessive.

Question 6

Which of the following is true about Gregor Mendel when he first started his experiments?

Accepted Answer

A)  Mendel worked with garden pea plants. 
B)  Mendel knew that some plants "breed true." 
C)  He knew that genes were responsible for observable traits. 
D)  Mendel worked on garden pea plants and knew that some plants "breed true." 
E)  Mendel worked on garden pea plants. He knew that some plants "breed true" and that genes were responsible for observable traits. 
A)  Mendel worked with garden pea plants. 
B)  Mendel knew that some plants "breed true." 
C)  He knew that genes were responsible for observable traits. 
D)  Mendel worked on garden pea plants and knew that some plants "breed true." 
E)  Mendel worked on garden pea plants. He knew that some plants "breed true" and that genes were responsible for observable traits.

Question 7

Turner syndrome is a

Accepted Answer

A)  monosomy. 
B)  trisomy. 
C)  condition with the normal set of chromosomes. 
D)  condition affecting only boys. 
E)  more than one of these. 
A)  monosomy. 
B)  trisomy. 
C)  condition with the normal set of chromosomes. 
D)  condition affecting only boys. 
E)  more than one of these.

Question 8

Various forms of the same gene are called

Accepted Answer

A)  genotypes. 
B)  alleles. 
C)  somatic. 
D)  recessive. 
E)  phenotypes. 
A)  genotypes. 
B)  alleles. 
C)  somatic. 
D)  recessive. 
E)  phenotypes.

Question 9

Siamese cats have enzymes that code for dark fur color but are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of

Accepted Answer

A)  pleiotropy. 
B)  environmental effects. 
C)  epistasis. 
D)  incomplete dominance. 
E)  co-dominance. 
A)  pleiotropy. 
B)  environmental effects. 
C)  epistasis. 
D)  incomplete dominance. 
E)  co-dominance.

Question 10

Match between columns
                        Premises: refers to a gene whose product influences multiple genes
the particular alleles carried by an individual
condition in which one allele is not fully dominant over another, so the heterozygous phenotype appears to be a blend of the two homozygous phenotypes
the set of symptoms that characterize a genetic disease
refers to two alleles that are both fully expressed in heterozygous individuals
a range of small differences in a shared trait
experiment in which individuals heterozgous for two genes are crossed
organism that has two different alleles of a gene
effect in which a trait is influenced by the product of multiple genes
a chromosome abnormality in which there are too many or too few copies of a particular chromosome

Accepted Answer

The Answer of continuous variation and codominance and dihybrid cross is...

Question 11

The number of different alleles for ABO types in the total human population is

Accepted Answer

A)  2. 
B)  3. 
C)  4. 
D)  6. 
E)  8. 
A)  2. 
B)  3. 
C)  4. 
D)  6. 
E)  8.

Question 12

An individual would develop cystic fibrosis if he carries ____ mutated CFTR gene(s).

Accepted Answer

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

Question 13

In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic.

Accepted Answer

A)  dominant 
B)  co-dominant 
C)  epistatic 
D)  pleiotropic 
E)  recessive 
A)  dominant 
B)  co-dominant 
C)  epistatic 
D)  pleiotropic 
E)  recessive

Question 14

Why are most X-linked disorders recessive?

Accepted Answer

A)  X-linked dominant disorders are always fatal to females 
B)  females only have one active X- dominant disorders would render them sterile 
C)  dominant X-linked disorders are almost always fatal to the male embryo 
D)  dominant X-linked disorders, regardless of their overall effect, prevent proper sperm formation 
E)  more than one of these is the reason why most X-linked disorders are fatal 
A)  X-linked dominant disorders are always fatal to females 
B)  females only have one active X- dominant disorders would render them sterile 
C)  dominant X-linked disorders are almost always fatal to the male embryo 
D)  dominant X-linked disorders, regardless of their overall effect, prevent proper sperm formation 
E)  more than one of these is the reason why most X-linked disorders are fatal

Question 15

If all the offspring of a cross had the genotype AaBb , the parents of the cross would most likely be

Accepted Answer

A)  AABB ´ aabb . 
B)  AAbb ´ aaBB . 
C)  AaBb ´ AaBb . 
D)  Aabb ´ aaBb . 
E)  AABB ´ aabb or AAbb ´ aaBB . 
A)  AABB ´ aabb . 
B)  AAbb ´ aaBB . 
C)  AaBb ´ AaBb . 
D)  Aabb ´ aaBb . 
E)  AABB ´ aabb or AAbb ´ aaBB .

Question 16

Which of the following organs have epithelial lined passageways and ducts that are affected in cystic fibrosis:

Accepted Answer

A)  lungs 
B)  liver 
C)  pancreas 
D)  intestines 
E)  all of these organs are affected 
A)  lungs 
B)  liver 
C)  pancreas 
D)  intestines 
E)  all of these organs are affected

Question 17

Match between columns
                        Premises: disorder that is dominant
disorder that is an X-linked recessive trait
disorder that occurs when an amino acid is not converted to tyrosine
disorder that results from lipid accumulations around nerve cells
disorder that results from a missing sex chromosome

Accepted Answer

The Answer of hemophilia and Hutchinson-Gifford progeria and PKU and is...

Question 18

George is a normal XY boy. Who among the following would essentially have the same Y chromosome as George?

Accepted Answer

A)  his father's brother 
B)  his mother's father 
C)  his mother's brother 
D)  his father's father 
E)  more than one of these is possible but only those who are related to his father 
A)  his father's brother 
B)  his mother's father 
C)  his mother's brother 
D)  his father's father 
E)  more than one of these is possible but only those who are related to his father

Question 19

The ABO blood types have ____ different genotypes.

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  12 
E)  16 
A)  4 
B)  6 
C)  8 
D)  12 
E)  16

Question 20

The most common type of mutation that cause cystic fibrosis is a

Accepted Answer

A)  deletion. 
B)  insertion. 
C)  base-pair substitution. 
D)  gene duplication. 
E)  transformation. 
A)  deletion. 
B)  insertion. 
C)  base-pair substitution. 
D)  gene duplication. 
E)  transformation.

Exam 9: Patterns of Inheritance

If a child has an AB blood type, the parents

If a pure-breeding wired-hair terrier ( WW ) is crossed with a pure-breeding smooth-hair terrier (ww), and a puppy with a wavy hair is produced, the simplest explanation is

In a pedigree chart, a male who does NOT demonstrate the trait being studied is represented by

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Gene A occurs on chromosome #5; gene B occurs on chromosome #21. Therefore, these two portions of the chromosome CANNOT be

Which of the following is true about Gregor Mendel when he first started his experiments?

Turner syndrome is a

Various forms of the same gene are called

Siamese cats have enzymes that code for dark fur color but are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of

The number of different alleles for ABO types in the total human population is

An individual would develop cystic fibrosis if he carries ____ mutated CFTR gene(s).

In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic.

Why are most X-linked disorders recessive?

If all the offspring of a cross had the genotype AaBb , the parents of the cross would most likely be

Which of the following organs have epithelial lined passageways and ducts that are affected in cystic fibrosis:

George is a normal XY boy. Who among the following would essentially have the same Y chromosome as George?

The ABO blood types have ____ different genotypes.

The most common type of mutation that cause cystic fibrosis is a

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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