Question 1

Janet is homozygous dominant for the wild-type allele of the gene that when mutant causes cystic fibrosis. Her brother Henry is a heterozygote. They both do not have the disease cystic fibrosis.

Accepted Answer

A) True 
 B)False

Question 2

Down syndrome is caused by

Accepted Answer

A)   nondisjunction or a translocation.
B)   the karyotype XXY.
C)   an extra Y chromosome.
D)   a missing autosome.E) A) and B)
F) All of the above

Question 3

People with aneuploid sex chromosomes are more severely affected than people with aneuploid autosomes.

Accepted Answer

A) True 
 B)False

Question 4

Absence of the SRY gene and expression of the Wnt4 gene are necessary for female reproductive structures to develop in an embryo and fetus.

Accepted Answer

A) True 
 B)False

Question 5

A bell curve is characteristic of the distribution of phenotypes of a multifactorial trait because

Accepted Answer

A)   the phenotypes in the middle of the curve correspond to fewer genotypes than the phenotypes at the ends of the distribution.
B)   the phenotypes at the ends of the curve correspond to fewer genotypes than the phenotypes at the middle of the distribution.
C)   most people are average for the trait.
D)   people at the extreme ends of the distribution do not survive to reproduce.E) A) and B)
F) A) and C)

Question 6

The two types of information needed to predict the inheritance pattern of a trait are

Accepted Answer

A)   the way genes are distributed in meiosis and the way that they come together when sperm joins egg.
B)   the health of the mother and the father.
C)   the way mitosis distributes the alleles of a gene and whether those alleles are dominant or recessive.
D)   the age at which the trait appears and how it affects males or females.E) B) and D)
F) A) and D)

Question 7

Which of the following chromosomal abnormalities most severely affect a fetus?

Accepted Answer

A)   XXX
B)   Monosomy for a large autosome
C)   Trisomy 21
D)   XXYE) None of the above
F) All of the above

Question 8

Gametes pass genetic information from generation to generation.

Accepted Answer

A) True 
 B)False

Question 9

Beard growth is a sex-influenced trait.

Accepted Answer

A) True 
 B)False

Question 10

A gene is

Accepted Answer

A)   a DNA sequence that contains the information for producing one type of protein.
B)   a structure that contains chromosomes.
C)   an amino acid sequence that contains the information for producing a particular DNA sequence.
D)   the collection of all of the protein-encoding DNA sequences on a particular chromosome.E) None of the above
F) All of the above

Question 11

In von Willebrand disease, which is either autosomal recessive or autosomal dominant, clotting time slows and the person bruises and bleeds easily. Not everyone who inherits the disease genotype actually develops the phenotype. Affected individuals have differing degrees of difficulty in clotting of blood. This condition is

Accepted Answer

A)   completely penetrant, variably expressive, and not genetically heterogeneic.
B)   incompletely penetrant, variably expressive, and genetically heterogeneic.
C)   completely penetrant, invariably expressive, and not genetically heterogeneic.
D)   pleiotropic and genetically heterogeneicE) All of the above
F) A) and D)

Question 12

An offspring of parents whose genotypes are Aa and Aa may be

Accepted Answer

A)   only Aa.
B)   AA or aa.
C)   AA, Aa, or aa.
D)   only aa.E) B) and C)
F) A) and D)

Question 13

The chemical group that binds to DNA causing genomic imprinting is

Accepted Answer

A)   methyl.
B)   RNA.
C)   a transcription factor.
D)   an amino acid.E) B) and D)
F) C) and D)

Question 14

Genes determine all of our characteristics.

Accepted Answer

A) True 
 B)False

Question 15

An autosomal condition affects only males.

Accepted Answer

A) True 
 B)False

Question 16

Cells from a woman with Turner syndrome have

Accepted Answer

A)   an extra X chromosome.
B)   one X and two Y chromosomes.
C)   only one X chromosome.
D)   no sex chromosomes.E) A) and B)
F) B) and C)

Question 17

Identical alleles are said to be

Accepted Answer

A)   homozygous.
B)   heterozygous.
C)   recessive.
D)   dominant.E) All of the above
F) None of the above

Question 18

A procedure used to obtain enough fetal tissue sampled through the cervix to test for genetic disorders without culturing cells is

Accepted Answer

A)   amniocentesis.
B)   chorionic villus sampling.
C)   ultrasonography.
D)   fetal cell sorting.E) All of the above
F) B) and D)

Question 19

The muscle disorder myotonic dystrophy can be caused by different genes, on different chromosomes. This means that the condition is genetically heterogeneic.

Accepted Answer

A) True 
 B)False

Question 20

The term "exome" refers to

Accepted Answer

A)   the parts of the genome that determine sex.
B)   the protein-encoding parts of the genome.
C)   the parts of the genome that lie exteriorly along the chromosomes.
D)   the set of RNAs made in a particular cell type under specific conditions.E) C) and D)
F) B) and C)

Exam 24: Genetics and Genomics

Genes determine all of our characteristics.

Correct Answer
verified

Janet is homozygous dominant for the wild-type allele of the gene that when mutant causes cystic fibrosis. Her brother Henry is a heterozygote. They both do not have the disease cystic fibrosis.

Correct Answer
verified

Correct Answer
verified

A gene is

Correct Answer
verified

People with aneuploid sex chromosomes are more severely affected than people with aneuploid autosomes.

Correct Answer
verified

The chemical group that binds to DNA causing genomic imprinting is

Correct Answer
verified

A bell curve is characteristic of the distribution of phenotypes of a multifactorial trait because

Correct Answer
verified

Absence of the SRY gene and expression of the Wnt4 gene are necessary for female reproductive structures to develop in an embryo and fetus.

Correct Answer
verified

Beard growth is a sex-influenced trait.

Correct Answer
verified

Gametes pass genetic information from generation to generation.

Correct Answer
verified

The muscle disorder myotonic dystrophy can be caused by different genes, on different chromosomes. This means that the condition is genetically heterogeneic.

Correct Answer
verified

The two types of information needed to predict the inheritance pattern of a trait are

Correct Answer
verified

Which of the following chromosomal abnormalities most severely affect a fetus?

Correct Answer
verified

Down syndrome is caused by

Correct Answer
verified

Cells from a woman with Turner syndrome have

Correct Answer
verified

The term "exome" refers to

Correct Answer
verified

A procedure used to obtain enough fetal tissue sampled through the cervix to test for genetic disorders without culturing cells is

Correct Answer
verified

An offspring of parents whose genotypes are Aa and Aa may be

Correct Answer
verified

An autosomal condition affects only males.

Correct Answer
verified

Identical alleles are said to be

Correct Answer
verified

Exam 24: Genetics and Genomics

Genes determine all of our characteristics.

Correct AnswerverifiedShow Answer

Janet is homozygous dominant for the wild-type allele of the gene that when mutant causes cystic fibrosis. Her brother Henry is a heterozygote. They both do not have the disease cystic fibrosis.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A gene is

Correct AnswerverifiedShow Answer

People with aneuploid sex chromosomes are more severely affected than people with aneuploid autosomes.

Correct AnswerverifiedShow Answer

The chemical group that binds to DNA causing genomic imprinting is

Correct AnswerverifiedShow Answer

A bell curve is characteristic of the distribution of phenotypes of a multifactorial trait because

Correct AnswerverifiedShow Answer

Absence of the SRY gene and expression of the Wnt4 gene are necessary for female reproductive structures to develop in an embryo and fetus.

Correct AnswerverifiedShow Answer

Beard growth is a sex-influenced trait.

Correct AnswerverifiedShow Answer

Gametes pass genetic information from generation to generation.

Correct AnswerverifiedShow Answer

The muscle disorder myotonic dystrophy can be caused by different genes, on different chromosomes. This means that the condition is genetically heterogeneic.

Correct AnswerverifiedShow Answer

The two types of information needed to predict the inheritance pattern of a trait are

Correct AnswerverifiedShow Answer

Which of the following chromosomal abnormalities most severely affect a fetus?

Correct AnswerverifiedShow Answer

Down syndrome is caused by

Correct AnswerverifiedShow Answer

Cells from a woman with Turner syndrome have

Correct AnswerverifiedShow Answer

The term "exome" refers to

Correct AnswerverifiedShow Answer

A procedure used to obtain enough fetal tissue sampled through the cervix to test for genetic disorders without culturing cells is

Correct AnswerverifiedShow Answer

An offspring of parents whose genotypes are Aa and Aa may be

Correct AnswerverifiedShow Answer

An autosomal condition affects only males.

Correct AnswerverifiedShow Answer

Identical alleles are said to be

Correct AnswerverifiedShow Answer

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