Question 1

If you cross pea plants that are heterozygous for purple flowers and yellow seeds (PpYy) , and you examine 800 offspring for flower and seed color, about how many do you expect to have white flowers and green seeds?

Accepted Answer

A)  all of them (800) 
B)  450
C)  400
D)  50
E)  150

Question 2

Which of the following conditions causes may cause infertility in a human?

Accepted Answer

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

Question 3

For which disorder can those affected be male or female?

Accepted Answer

A)  Turner syndrome
B)  Klinefelter syndrome
C)  trisomy X
D)  XYY syndrome
E)  Down syndrome

Question 4

A human sperm cell possesses autosomes and:

Accepted Answer

A)  exactly the same genetic information as a body cell.
B)  an X chromosome always.
C)  either an X or a Y chromosome.
D)  a Y chromosome always.
E)  both an X and a Y chromosome.

Question 5

If two parents are carriers of albinism (an autosomal recessive trait) , what is the chance that their fourth child will have a homozygous genotype?

Accepted Answer

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

Question 6

Autosomal nondisjunction can result in:

Accepted Answer

A)  XYY males.
B)  Turner syndrome.
C)  Klinefelter syndrome.
D)  trisomy X.
E)  Down syndrome.

Question 7

Yellow-seeded pea plants may be homozygous or heterozygous. To find out which, we can cross the plants with:

Accepted Answer

A)  true-breeding yellow-seeded plants.
B)  true-breeding green-seeded plants.
C)  heterozygous green-seeded plants.
D)  heterozygous yellow-seeded plants
E)  the same genotype.

Question 8

The physical manifestation of an organism's genes is its:

Accepted Answer

A)  environment.
B)  genotype.
C)  phenotype.
D)  genetic code.
E)  number of chromosomes.

Question 9

Hemophilia is a sex-linked recessive gene that causes a blood disorder. What are the chances that the daughter of a normal man and a heterozygous woman will have hemophilia?

Accepted Answer

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

Question 10

What type of allele produces its effects in only homozygous individuals?

Accepted Answer

A)  recessive
B)  dominant
C)  haploid
D)  diploid

Question 11

The failure of chromosomes to segregate properly during meiosis is called:

Accepted Answer

A)  nondisjunction.
B)  translocation.
C)  replication.
D)  inversion.
E)  independent assortment.

Question 12

Color blindness is more common in men than in women because:

Accepted Answer

A)  men have only one X chromosome.
B)  the gene is located on the Y chromosome.
C)  women cannot inherit the gene from their fathers.
D)  crossing over occurs only in women.
E)  men get more copies of the gene than do women.

Question 13

A color-blind boy has a mother with normal vision and a color-blind father. From which parent did he get the color-blind gene?

Accepted Answer

A)  father
B)  mother
C)  either mother or father

Question 14

All of the following combinations are possible in the gametes of an organism that is AaBb EXCEPT:

Accepted Answer

A)  AB.
B)  aB.
C)  aa.
D)  ab.
E)  Ab.

Question 15

Hemophilia is a genetic disease that has plagued the royal houses of Europe since the time of Queen Victoria, who was a carrier. Her granddaughter, Alexandria, married Nicholas II, the last czar of imperial Russia. Alexandria was a carrier for hemophilia, but Nicholas was normal. Their son, Alexis, was afflicted with the disease. Alexis and his four sisters were all killed in 1917. Based on this scenario, it is most likely that:

Accepted Answer

A)  none of the four sisters carried the hemophilia gene.
B)  each of the sisters had a 50% chance of being a carrier of the gene.
C)  all four sisters were carriers of the hemophilia gene.
D)  at least one of the sisters had hemophilia like Alexis.
E)  Alexis inherited the hemophilia gene from Nicholas II.

Question 16

The wavy hair in children of straight-haired and curly-haired parents is the result of ________.

Accepted Answer

incomplete...

Question 17

Which disorder is the most common chromosome anomaly among newborns?

Accepted Answer

A)  Turner syndrome
B)  Klinefelter syndrome
C)  trisomy X
D)  XYY syndrome
E)  Down syndrome

Question 18

An individual who is a carrier for a sex-linked trait, such as hemophilia:

Accepted Answer

A)  is always male.
B)  is homozygous for the recessive condition.
C)  shows the dominant phenotype.
D)  cannot pass the gene on to his or her daughters.

Question 19

A sex-linked recessive condition that causes abnormal color vision is called:

Accepted Answer

A)  cystic fibrosis.
B)  Down syndrome.
C)  hemophilia.
D)  color blindness.

Question 20

A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is:

Accepted Answer

A)  cystic fibrosis.
B)  Down syndrome.
C)  hemophilia.
D)  color blindness.

Exam 10: Patterns of Inheritance

Color blindness is more common in men than in women because:

Correct Answer
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Correct Answer
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The physical manifestation of an organism's genes is its:

Correct Answer
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Autosomal nondisjunction can result in:

Correct Answer
verified

A color-blind boy has a mother with normal vision and a color-blind father. From which parent did he get the color-blind gene?

Correct Answer
verified

A sex-linked recessive condition that causes abnormal color vision is called:

Correct Answer
verified

All of the following combinations are possible in the gametes of an organism that is AaBb EXCEPT:

Correct Answer
verified

Yellow-seeded pea plants may be homozygous or heterozygous. To find out which, we can cross the plants with:

Correct Answer
verified

For which disorder can those affected be male or female?

Correct Answer
verified

A human sperm cell possesses autosomes and:

Correct Answer
verified

Hemophilia is a sex-linked recessive gene that causes a blood disorder. What are the chances that the daughter of a normal man and a heterozygous woman will have hemophilia?

Correct Answer
verified

The wavy hair in children of straight-haired and curly-haired parents is the result of ________.

Correct Answer
verified
incomplete...
View Answer

Which disorder is the most common chromosome anomaly among newborns?

Correct Answer
verified

Which of the following conditions causes may cause infertility in a human?

Correct Answer
verified

If you cross pea plants that are heterozygous for purple flowers and yellow seeds (PpYy) , and you examine 800 offspring for flower and seed color, about how many do you expect to have white flowers and green seeds?

Correct Answer
verified

If two parents are carriers of albinism (an autosomal recessive trait) , what is the chance that their fourth child will have a homozygous genotype?

Correct Answer
verified

A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is:

Correct Answer
verified

What type of allele produces its effects in only homozygous individuals?

Correct Answer
verified

An individual who is a carrier for a sex-linked trait, such as hemophilia:

Correct Answer
verified

The failure of chromosomes to segregate properly during meiosis is called:

Correct Answer
verified

Exam 10: Patterns of Inheritance

Color blindness is more common in men than in women because:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The physical manifestation of an organism's genes is its:

Correct AnswerverifiedShow Answer

Autosomal nondisjunction can result in:

Correct AnswerverifiedShow Answer

A color-blind boy has a mother with normal vision and a color-blind father. From which parent did he get the color-blind gene?

Correct AnswerverifiedShow Answer

A sex-linked recessive condition that causes abnormal color vision is called:

Correct AnswerverifiedShow Answer

All of the following combinations are possible in the gametes of an organism that is AaBb EXCEPT:

Correct AnswerverifiedShow Answer

Yellow-seeded pea plants may be homozygous or heterozygous. To find out which, we can cross the plants with:

Correct AnswerverifiedShow Answer

For which disorder can those affected be male or female?

Correct AnswerverifiedShow Answer

A human sperm cell possesses autosomes and:

Correct AnswerverifiedShow Answer

Hemophilia is a sex-linked recessive gene that causes a blood disorder. What are the chances that the daughter of a normal man and a heterozygous woman will have hemophilia?

Correct AnswerverifiedShow Answer

The wavy hair in children of straight-haired and curly-haired parents is the result of ________.

Correct Answerverifiedincomplete...View AnswerShow Answer

Which disorder is the most common chromosome anomaly among newborns?

Correct AnswerverifiedShow Answer

Which of the following conditions causes may cause infertility in a human?

Correct AnswerverifiedShow Answer

If you cross pea plants that are heterozygous for purple flowers and yellow seeds (PpYy) , and you examine 800 offspring for flower and seed color, about how many do you expect to have white flowers and green seeds?

Correct AnswerverifiedShow Answer

If two parents are carriers of albinism (an autosomal recessive trait) , what is the chance that their fourth child will have a homozygous genotype?

Correct AnswerverifiedShow Answer

A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is:

Correct AnswerverifiedShow Answer

What type of allele produces its effects in only homozygous individuals?

Correct AnswerverifiedShow Answer

An individual who is a carrier for a sex-linked trait, such as hemophilia:

Correct AnswerverifiedShow Answer

The failure of chromosomes to segregate properly during meiosis is called:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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