Question 1

A disorder that skips generations, affects both sexes, and is transmitted by parents who either have the condition or carry it is autosomal recessive.

Accepted Answer

A) True 
 B)False

Question 2

A multifactorial trait is determined by many environmental factors, but not necessarily genetic influences.

Accepted Answer

A) True 
 B)False

Question 3

Chorionic villus sampling can be performed earlier in pregnancy than amniocentesis.

Accepted Answer

A) True 
 B)False

Question 4

In a simple dominant-recessive inheritance pattern, what is the chance of the offspring exhibiting the dominant trait if one parent is heterozygous and the other is homozygous recessive?

Accepted Answer

A)  25%
B)  50%
C)  75%
D)  100%E) C) and D)
F) B) and C)

Question 5

A pedigree is a chart that aligns chromosome pairs by size.

Accepted Answer

A) True 
 B)False

Question 6

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 7

An autosomal dominant condition in a family will disappear if in any generation no one inherits the disease.

Accepted Answer

A) True 
 B)False

Question 8

Studies have indicated a genetic link between a chromosome abnormality and acute myeloid leukemia, a deadly cancer affecting white blood cell production. Many sufferers of the cancer also possess monosomy 7, which is passed along generations in their families and also corresponds with the incidence of cancer in its members. What would you notice on a karyotype taken from a family with a trend of genetic-linked acute myeloid leukemia?

Accepted Answer

A)  Seven copies of each chromosome
B)  Three copies of each chromosome
C)  Only one copy each of the 7ᵗʰ and the 21ˢᵗ chromosome
D)  Only one copy of the 7ᵗʰ chromosomeE) A) and B)
F) A) and C)

Question 9

The chemical groups that binds to DNA causing genomic imprinting are

Accepted Answer

A)  methyl groups.
B)  RNA molecules.
C)  transcription factors.
D)  amino acids.E) B) and C)
F) A) and D)

Question 10

A multifactorial trait is determined by

Accepted Answer

A)  only environmental factors.
B)  only genetic factors.
C)  neither genetic nor environmental factors.
D)  one or more genes and the environment.E) None of the above
F) B) and C)

Question 11

Variable expressivity and pleiotropy can account for a disease that produces different intensities of symptoms or different symptoms among individuals.

Accepted Answer

A) True 
 B)False

Question 12

An allele that is not expressed in the heterozygous condition is

Accepted Answer

A)  recessive.
B)  dominant.
C)  autosomal.
D)  codominant.E) All of the above
F) A) and B)

Question 13

An inverted bell-shaped curve represents the distribution of phenotypes of a multifactorial trait in a population.

Accepted Answer

A) True 
 B)False

Question 14

Observing a karyotype for a fetus, an obstetrician notices that for the 16ᵗʰ chromosome, there are 3 structures shown. What sort of chromosomal abnormality does this fetus have?

Accepted Answer

A)  A monosomy
B)  Incomplete dominance
C)  A trisomy
D)  PolyploidyE) A) and B)
F) B) and C)

Question 15

Chromosomes carry genes and genes carry genomes.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following prenatal tests is non-invasive?

Accepted Answer

A)  Amniocentesis
B)  Chorionic villi sampling
C)  Ultrasound
D)  Inserting a shunt into a fetus with water on the brainE) B) and D)
F) B) and C)

Question 17

An autosomal condition affects only males.

Accepted Answer

A) True 
 B)False

Question 18

In incomplete dominance,

Accepted Answer

A)  the heterozygous phenotype is intermediate between that of either homozygote.
B)  one allele masks the effect of the other.
C)  one allele is inactive.
D)  only one sex is affected.E) A) and B)
F) All of the above

Question 19

A person normally has two alleles of a gene because

Accepted Answer

A)  DNA only comes in two forms.
B)  one allele of a gene is carried on each of two homologous chromosomes.
C)  there isn't enough DNA to accommodate more than this.
D)  all genes come in only two varieties.E) A) and D)
F) A) and C)

Question 20

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

Exam 24: Genetics and Genomics

The chemical groups that binds to DNA causing genomic imprinting are

Correct Answer
verified

Observing a karyotype for a fetus, an obstetrician notices that for the 16ᵗʰ chromosome, there are 3 structures shown. What sort of chromosomal abnormality does this fetus have?

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

An autosomal dominant condition in a family will disappear if in any generation no one inherits the disease.

Correct Answer
verified

A gene is

Correct Answer
verified

In a simple dominant-recessive inheritance pattern, what is the chance of the offspring exhibiting the dominant trait if one parent is heterozygous and the other is homozygous recessive?

Correct Answer
verified

An allele that is not expressed in the heterozygous condition is

Correct Answer
verified

An autosomal condition affects only males.

Correct Answer
verified

Chorionic villus sampling can be performed earlier in pregnancy than amniocentesis.

Correct Answer
verified

In incomplete dominance,

Correct Answer
verified

Correct Answer
verified

Chromosomes carry genes and genes carry genomes.

Correct Answer
verified

A disorder that skips generations, affects both sexes, and is transmitted by parents who either have the condition or carry it is autosomal recessive.

Correct Answer
verified

Which of the following prenatal tests is non-invasive?

Correct Answer
verified

A pedigree is a chart that aligns chromosome pairs by size.

Correct Answer
verified

An inverted bell-shaped curve represents the distribution of phenotypes of a multifactorial trait in a population.

Correct Answer
verified

A multifactorial trait is determined by many environmental factors, but not necessarily genetic influences.

Correct Answer
verified

Variable expressivity and pleiotropy can account for a disease that produces different intensities of symptoms or different symptoms among individuals.

Correct Answer
verified

A person normally has two alleles of a gene because

Correct Answer
verified

A multifactorial trait is determined by

Correct Answer
verified

Exam 24: Genetics and Genomics

The chemical groups that binds to DNA causing genomic imprinting are

Correct AnswerverifiedShow Answer

Observing a karyotype for a fetus, an obstetrician notices that for the 16ᵗʰ chromosome, there are 3 structures shown. What sort of chromosomal abnormality does this fetus have?

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

An autosomal dominant condition in a family will disappear if in any generation no one inherits the disease.

Correct AnswerverifiedShow Answer

A gene is

Correct AnswerverifiedShow Answer

In a simple dominant-recessive inheritance pattern, what is the chance of the offspring exhibiting the dominant trait if one parent is heterozygous and the other is homozygous recessive?

Correct AnswerverifiedShow Answer

An allele that is not expressed in the heterozygous condition is

Correct AnswerverifiedShow Answer

An autosomal condition affects only males.

Correct AnswerverifiedShow Answer

Chorionic villus sampling can be performed earlier in pregnancy than amniocentesis.

Correct AnswerverifiedShow Answer

In incomplete dominance,

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Chromosomes carry genes and genes carry genomes.

Correct AnswerverifiedShow Answer

A disorder that skips generations, affects both sexes, and is transmitted by parents who either have the condition or carry it is autosomal recessive.

Correct AnswerverifiedShow Answer

Which of the following prenatal tests is non-invasive?

Correct AnswerverifiedShow Answer

A pedigree is a chart that aligns chromosome pairs by size.

Correct AnswerverifiedShow Answer

An inverted bell-shaped curve represents the distribution of phenotypes of a multifactorial trait in a population.

Correct AnswerverifiedShow Answer

A multifactorial trait is determined by many environmental factors, but not necessarily genetic influences.

Correct AnswerverifiedShow Answer

Variable expressivity and pleiotropy can account for a disease that produces different intensities of symptoms or different symptoms among individuals.

Correct AnswerverifiedShow Answer

A person normally has two alleles of a gene because

Correct AnswerverifiedShow Answer

A multifactorial trait is determined by

Correct AnswerverifiedShow Answer

Correct Answer
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