Question 1

What is the expected expression of a monogenic trait that has its locus on the Y chromosome?

Accepted Answer

A) Females never inherit the trait. 
B) Females inheriting the trait will be carriers. 
C) Males inherit the trait in a dominant pattern of expression;females inherit the trait in a recessive pattern of expression. 
D) Females inherit the trait in a dominant pattern of expression;males inherit the trait in a recessive pattern of expression. 
A) Females never inherit the trait. 
B) Females inheriting the trait will be carriers. 
C) Males inherit the trait in a dominant pattern of expression;females inherit the trait in a recessive pattern of expression. 
D) Females inherit the trait in a dominant pattern of expression;males inherit the trait in a recessive pattern of expression.

Question 2

What is the expected outcome of any pregnancy or child produced by two parents who are each heterozygous for the Huntington disease allele?

Accepted Answer

A) The couple cannot produce children who are unaffected. 
B) Homozygous offspring will express the disease in childhood instead of as an adult. 
C) A child who is homozygous for the mutated alleles is not likely to transmit the disorder to his or her children. 
D) Because of the possibility of incomplete or low penetrance,an unaffected offspring could have an affected child. 
A) The couple cannot produce children who are unaffected. 
B) Homozygous offspring will express the disease in childhood instead of as an adult. 
C) A child who is homozygous for the mutated alleles is not likely to transmit the disorder to his or her children. 
D) Because of the possibility of incomplete or low penetrance,an unaffected offspring could have an affected child.

Question 3

A woman (Adele)has three daughters (Barbara,Brenda,Beverly)with a man (Adam)who is color-blind.Barbara has a daughter (Carol)and a son (Cliff)who have normal color vision.Brenda has no children.Beverly has two sons (Carl,Charlie)who are both color-blind.To which genetic generation do Carl and Charlie belong?

Accepted Answer

A) P1 
B) P2 
C) F1 
D) F2 
A) P1 
B) P2 
C) F1 
D) F2

Question 4

If there are 10 possible alleles for the single gene trait of nose shape,how many alleles can a person with euploid chromosomes inherit from his or her biological parents?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 5 
A) 1 
B) 2 
C) 4 
D) 5

Question 5

When calculating the recurrence risk for a complex possibly polygenic disorder with a couple who already have one child with the disorder,which additional factor has the greatest impact on increasing this risk?

Accepted Answer

A) The child with the disorder is male and the overall incidence of the disorder is twice as high in males than females. 
B) Both the mother and the father are heavily exposed to a variety of chemicals in their workplaces. 
C) The father has a nephew with a mild form of the same disorder. 
D) The mother has a brother who also has the same disorder. 
A) The child with the disorder is male and the overall incidence of the disorder is twice as high in males than females. 
B) Both the mother and the father are heavily exposed to a variety of chemicals in their workplaces. 
C) The father has a nephew with a mild form of the same disorder. 
D) The mother has a brother who also has the same disorder.

What is the expected expression of a monogenic trait that has its locus on the Y chromosome?

What is the expected outcome of any pregnancy or child produced by two parents who are each heterozygous for the Huntington disease allele?

If there are 10 possible alleles for the single gene trait of nose shape,how many alleles can a person with euploid chromosomes inherit from his or her biological parents?

When calculating the recurrence risk for a complex possibly polygenic disorder with a couple who already have one child with the disorder,which additional factor has the greatest impact on increasing this risk?

DNA Structure and Function

Protein Synthesis

Genetic Influences on Cell Growth, cell Differentiation, and Gametogenesis

Chromosomal and Mitochondrial Inheritance and Disorders

Family History and Pedigree Construction

Congenital Anomalies, basic Dysmorphology, and Genetic Assessment

Enzyme and Collagen Disorders

Common Childhood-Onset Genetic Disorders

Common Adult-Onset Genetic Disorders

Cardiovascular Disorders

The Genetics of Cancer

Genetic Contributions to Psychiatric and Behavioral Disorders

Genetic and Genomic Testing

Assessing Genomic Variation in Drug Response

Health Professionals and Genomic Care

Financial,legal,ethical,and Social Considerations

Genetic and Genomic Variation

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Exam 4: Patterns of Inheritance

What is the expected expression of a monogenic trait that has its locus on the Y chromosome?

What is the expected outcome of any pregnancy or child produced by two parents who are each heterozygous for the Huntington disease allele?

If there are 10 possible alleles for the single gene trait of nose shape,how many alleles can a person with euploid chromosomes inherit from his or her biological parents?

When calculating the recurrence risk for a complex possibly polygenic disorder with a couple who already have one child with the disorder,which additional factor has the greatest impact on increasing this risk?

DNA Structure and Function

Protein Synthesis

Genetic Influences on Cell Growth, cell Differentiation, and Gametogenesis

Chromosomal and Mitochondrial Inheritance and Disorders

Family History and Pedigree Construction

Congenital Anomalies, basic Dysmorphology, and Genetic Assessment

Enzyme and Collagen Disorders

Common Childhood-Onset Genetic Disorders

Common Adult-Onset Genetic Disorders

Cardiovascular Disorders

The Genetics of Cancer

Genetic Contributions to Psychiatric and Behavioral Disorders

Genetic and Genomic Testing

Assessing Genomic Variation in Drug Response

Health Professionals and Genomic Care

Financial,legal,ethical,and Social Considerations

Genetic and Genomic Variation

Filters