Question 1

The parents in the figure below are carriers of a genetic disorder. Based on the Punnett square, the allele that causes the disorder must

Accepted Answer

A) be autosomal. 
B) be sex-linked. 
C) be incompletely dominant. 
D) result from the linkage of A and 
A) be autosomal. 
B) be sex-linked. 
C) be incompletely dominant. 
D) result from the linkage of A and

Question 2

The known human genetic diseases are due to abnormalities located on just a few chromosomes.

Accepted Answer

A) True 
 B)False

Question 3

An allele that appears to "skip generations" is most likely

Accepted Answer

A) dominant. 
B) recessive. 
C) sex-linked. 
D) autosomal. 
A) dominant. 
B) recessive. 
C) sex-linked. 
D) autosomal.

Question 4

Chromosomes are composed of DNA and

Accepted Answer

A) RNA. 
B) alleles. 
C) lipids. 
D) proteins. 
A) RNA. 
B) alleles. 
C) lipids. 
D) proteins.

Question 5

Genes become linked when crossing-over occurs between nonhomologous chromosomes.

Accepted Answer

A) True 
 B)False

Question 6

Genes that are located on opposite ends of the same chromosome are

Accepted Answer

A) not affected by crossing-over. 
B) affected by crossing-over at the same frequency as genes that are located next to each other on the same chromosome. 
C) only affected by cross-over events that occur between two nonhomologous chromosomes. 
D) affected by crossing-over so frequently that they may appear to undergo independent assortment. 
A) not affected by crossing-over. 
B) affected by crossing-over at the same frequency as genes that are located next to each other on the same chromosome. 
C) only affected by cross-over events that occur between two nonhomologous chromosomes. 
D) affected by crossing-over so frequently that they may appear to undergo independent assortment.

Question 7

A parent who is a carrier for the recessive autosomal disorder B has the genotype ____________________.

Accepted Answer

The answer of A parent who is a carrier for...

Question 8

Males with a recessive X-linked allele that causes a disorder do not always show symptoms because they can also carry a dominant allele on their Y chromosome.

Accepted Answer

A) True 
 B)False

Question 9

Most inherited human disorders are the result of

Accepted Answer

A) recessive mutations of genes located on autosomes. 
B) recessive mutations of genes located on the X chromosome. 
C) recessive mutations of genes located on the Y chromosome. 
D) simultaneous mutations of the same gene on homologous chromosomes. 
A) recessive mutations of genes located on autosomes. 
B) recessive mutations of genes located on the X chromosome. 
C) recessive mutations of genes located on the Y chromosome. 
D) simultaneous mutations of the same gene on homologous chromosomes.

Question 10

Sex-linked genes are found on either the X chromosome or the Y chromosome but not both.

Accepted Answer

A) True 
 B)False

Question 11

A ____________________ is a chart that shows genetic relationships within a family over several generations.

Accepted Answer

The answer of A ____________________ is a chart that shows...

Question 12

Which of the following processes is not a method of generating new combinations of alleles in the offspring of two individuals?

Accepted Answer

A) crossing-over between chromosomes 
B) fertilization of an egg by a sperm 
C) independent assortment of chromosomes 
D) linkage of genes 
A) crossing-over between chromosomes 
B) fertilization of an egg by a sperm 
C) independent assortment of chromosomes 
D) linkage of genes

Question 13

The diagram below depicts the process of translocation.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements about crossing-over is true?

Accepted Answer

A) It lowers the likelihood of genetic recombination. 
B) It disrupts the linkage between genes. 
C) It results in the production of extra chromosomes. 
D) It is usually fatal. 
A) It lowers the likelihood of genetic recombination. 
B) It disrupts the linkage between genes. 
C) It results in the production of extra chromosomes. 
D) It is usually fatal.

Question 15

Which of the following genotypes represents a human female?

Accepted Answer

A) XY 
B) XX 
C) YY 
D) Zz 
A) XY 
B) XX 
C) YY 
D) Zz

Exam 13: Chromosomes and Human Genetics

The parents in the figure below are carriers of a genetic disorder. Based on the Punnett square, the allele that causes the disorder must

The known human genetic diseases are due to abnormalities located on just a few chromosomes.

An allele that appears to "skip generations" is most likely

Chromosomes are composed of DNA and

Genes become linked when crossing-over occurs between nonhomologous chromosomes.

Genes that are located on opposite ends of the same chromosome are

A parent who is a carrier for the recessive autosomal disorder B has the genotype ____________________.

Males with a recessive X-linked allele that causes a disorder do not always show symptoms because they can also carry a dominant allele on their Y chromosome.

Most inherited human disorders are the result of

Sex-linked genes are found on either the X chromosome or the Y chromosome but not both.

A ____________________ is a chart that shows genetic relationships within a family over several generations.

Which of the following processes is not a method of generating new combinations of alleles in the offspring of two individuals?

The diagram below depicts the process of translocation.

Which of the following statements about crossing-over is true?

Which of the following genotypes represents a human female?

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