Question 1

Symptoms of phenylketonuria (PKU)  may be minimized or suppressed by a diet low in ____.

Accepted Answer

A)  serine
B)  glycine
C)  phenylalanine
D)  proline
E)  glutamic acid

Question 2

Which X-linked recessive trait affects an individual's blood clotting ability?

Accepted Answer

A)  red-green colorblindness
B)  hemophilia A
C)  Duchenne muscular dystrophy
D)  X-linked anhidrotic dysplasia
E)  androgen insensitivity syndrome

Question 3

A human X-linked recessive gene may be ____.

Accepted Answer

A)  found on the Y chromosome
B)  passed to daughters from their fathers
C)  passed to sons from their fathers
D)  expressed more commonly among females
E)  passed to daughters and sons from their fathers

Question 4

Any child of two carriers for an autosomal recessive trait has a _____% chance of inheriting this trait.

Accepted Answer

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

Question 5

Which disorder displays an autosomal dominant pattern of inheritance?

Accepted Answer

A)  Huntington's disease
B)  phenylketonuria
C)  color blindness
D)  hemophilia
E)  albinism

Question 6

Fusion of a normal gamete (n)  with a gamete missing a chromosome (n − 1)  gives rise to a zygote with a condition called ____.

Accepted Answer

A)  ​trisomy
B)  ​monosomy
C)  ​polyploidy
D)  ​monoploidy
E)  ​translocation

Question 7

If both parents are heterozygous for Huntington's disease, what is the likelihood that their offspring will have Huntington's disease?

Accepted Answer

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

Question 8

Which traits appear in every generation of a family and occur with equal frequency in both sexes?

Accepted Answer

A)  autosomal dominant
B)  autosomal recessive
C)  X-linked dominant
D)  X-linked recessive
E)  Y-linked dominant

Question 9

Amniocentesis is a ____.

Accepted Answer

A)  surgical means of repairing deformities
B)  form of chemotherapy that modifies or inhibits gene expression or the function of gene products
C)  prenatal diagnostic method used to detect chromosomal abnormalities in embryos
D)  form of gene replacement therapy
E)  pre-conception test

Question 10

Red-green colorblindness is an X-linked recessive trait in humans. A colorblind woman and a man with normal vision have a son. What is the probability that the son is color blind?

Accepted Answer

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

Question 11

The human X and Y chromosomes ____.

Accepted Answer

A)  developed from two homologous chromosomes that diverged during evolution​
B)  both contain the SRY gene​
C)  are the same size​
D)  are homologous along their entire lengths​
E)  cross over mostly in their shared middle regions​

Question 12

When studying a single-gene inherited disorder such as Huntington's disease, researchers may construct a chart called a ____ to look for family connections.

Accepted Answer

A)  pedigree
B)  family history
C)  family tree
D)  linkage map
E)  trisomy

Question 13

The condition that occurs when an organism has a full set of chromosomes (2n)  plus an additional chromosome is known as ____.

Accepted Answer

A)  monosomy
B)  trisomy
C)  polyploidy
D)  haploidy
E)  diploidy

Question 14

When a baby is born with six fingers, the doctor may explain to the parents that this trait is a genetic ____, or a rare version of a trait.

Accepted Answer

A)  disorder
B)  mutation
C)  abnormality
D)  disease
E)  event

Question 15

Individuals with Down syndrome have three copies of chromosome ____.

Accepted Answer

A)  3
B)  5
C)  15
D)  19
E)  21

Question 16

The sex chromosome composition of a person with Klinefelter syndrome is ____.

Accepted Answer

A)  XXX
B)  XO
C)  XXY
D)  XYY
E)  XY

Question 17

Sometimes homologous chromosomes fail to separate during meiosis, resulting in one daughter cell with an extra chromosome and one daughter cell missing a chromosome. This failure of chromosome separation is called ____.

Accepted Answer

A)  nondisjunction
B)  nonseparation
C)  disjunction
D)  homologue attachment
E)  meiosis I failure

Question 18

The inheritance of a certain allele of a gene that leads to medical problems indicates a genetic ____.

Accepted Answer

A)  malfunction
B)  version
C)  abnormality
D)  sickness
E)  disorder

Question 19

About 70% of flowering plant species are ____.​

Accepted Answer

A)  ​trisomic
B)  ​aneuploid
C)  diploid​
D)  monoploid​
E)  polyploid​

Question 20

Most translocations are reciprocal, meaning that two ____ exchange broken parts.

Accepted Answer

A)  organisms​
B)  sister chromatids​
C)  alleles​
D)  nonhomologous chromosomes​
E)  homologous chromosomes​

Exam 14: Human Inheritance

The human X and Y chromosomes ____.

Correct AnswerverifiedShow Answer

About 70% of flowering plant species are ____.​

Correct AnswerverifiedShow Answer

Individuals with Down syndrome have three copies of chromosome ____.

Correct AnswerverifiedShow Answer

When a baby is born with six fingers, the doctor may explain to the parents that this trait is a genetic ____, or a rare version of a trait.

Correct AnswerverifiedShow Answer

Which disorder displays an autosomal dominant pattern of inheritance?

Correct AnswerverifiedShow Answer

The sex chromosome composition of a person with Klinefelter syndrome is ____.

Correct AnswerverifiedShow Answer

The inheritance of a certain allele of a gene that leads to medical problems indicates a genetic ____.

Correct AnswerverifiedShow Answer

Which traits appear in every generation of a family and occur with equal frequency in both sexes?

Correct AnswerverifiedShow Answer

Amniocentesis is a ____.

Correct AnswerverifiedShow Answer

Most translocations are reciprocal, meaning that two ____ exchange broken parts.

Correct AnswerverifiedShow Answer

Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in ____.

Correct AnswerverifiedShow Answer

Fusion of a normal gamete (n) with a gamete missing a chromosome (n − 1) gives rise to a zygote with a condition called ____.

Correct AnswerverifiedShow Answer

When studying a single-gene inherited disorder such as Huntington's disease, researchers may construct a chart called a ____ to look for family connections.

Correct AnswerverifiedShow Answer

If both parents are heterozygous for Huntington's disease, what is the likelihood that their offspring will have Huntington's disease?

Correct AnswerverifiedShow Answer

Red-green colorblindness is an X-linked recessive trait in humans. A colorblind woman and a man with normal vision have a son. What is the probability that the son is color blind?

Correct AnswerverifiedShow Answer

Any child of two carriers for an autosomal recessive trait has a _____% chance of inheriting this trait.

Correct AnswerverifiedShow Answer

A human X-linked recessive gene may be ____.

Correct AnswerverifiedShow Answer

The condition that occurs when an organism has a full set of chromosomes (2n) plus an additional chromosome is known as ____.

Correct AnswerverifiedShow Answer

Sometimes homologous chromosomes fail to separate during meiosis, resulting in one daughter cell with an extra chromosome and one daughter cell missing a chromosome. This failure of chromosome separation is called ____.

Correct AnswerverifiedShow Answer

Which X-linked recessive trait affects an individual's blood clotting ability?

Correct AnswerverifiedShow Answer

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About 70% of flowering plant species are ____.

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