Question 1

GenA occurs on chromosom#5; genB occurs on chromosom#21.Therefore, thestwo portions of thchromosomCANNOT be

Accepted Answer

A) genes. 
B) dominants. 
C) loci. 
D) alleles. 
E) recessive. 
A) genes. 
B) dominants. 
C) loci. 
D) alleles. 
E) recessive. D

Question 2

Which of thfollowing is responsiblfor observabltraits?

Accepted Answer

A) phenotype 
B) genotype 
C) prototype 
D) morphotype 
E) phototype 
A) phenotype 
B) genotype 
C) prototype 
D) morphotype 
E) phototype B

Question 3

In incompletdominance,

Accepted Answer

A) one allele is not dominant to another allele. 
B) the genotype can be determined by the phenotype. 
C) the heterozygote is somewhat intermediate to the two homozygotes. 
D) the intermediate phenotype may be the result of enzyme insufficiency. 
E) all of these are true. 
A) one allele is not dominant to another allele. 
B) the genotype can be determined by the phenotype. 
C) the heterozygote is somewhat intermediate to the two homozygotes. 
D) the intermediate phenotype may be the result of enzyme insufficiency. 
E) all of these are true. E

Question 4

Four of thfivanswers listebelow describthheterozygous condition.Select thEXCEPTION.

Accepted Answer

A) homozygous 
B) carrier 
C) heterozygous 
D) hybrid 
E) Aa 
A) homozygous 
B) carrier 
C) heterozygous 
D) hybrid 
E) Aa

Question 5

Likmany genetic disorders, galactosemia is a disruption of a metabolic pathway duto a malfunctioning

Accepted Answer

A) reactant. 
B) cofactor. 
C) enzyme. 
D) energy source. 
E) product. 
A) reactant. 
B) cofactor. 
C) enzyme. 
D) energy source. 
E) product.

Question 6

In thsecongeneration of a cross of DDRR with ddrr thmost common genotypwoulbe

Accepted Answer

A) DDRR. 
B) DdRR. 
C) DdRr. 
D) ddRR. 
E) ddRr. 
A) DDRR. 
B) DdRR. 
C) DdRr. 
D) ddRR. 
E) ddRr.

Question 7

A human X-linkerecessivgenmay be

Accepted Answer

A) on the Y chromosome. 
B) passed to daughters from their fathers. 
C) passed to sons from their mothers. 
D) expressed more commonly among females. 
E) passed to daughters from their fathers and passed to sons from their mothers. 
A) on the Y chromosome. 
B) passed to daughters from their fathers. 
C) passed to sons from their mothers. 
D) expressed more commonly among females. 
E) passed to daughters from their fathers and passed to sons from their mothers.

Question 8

In humans, skin color is commandeby several genes.Thus, skin color is a(n) __________ characteristic.

Accepted Answer

A) dominant 
B) autosomal 
C) epistatic 
D) pleiotropic 
E) recessive 
A) dominant 
B) autosomal 
C) epistatic 
D) pleiotropic 
E) recessive

Question 9

Which of thfollowing describes thcondition of a cell that has morthan 2n chromosomes?

Accepted Answer

A) reploidy 
B) haploidy 
C) diploidy 
D) polyploidy 
E) proploidy 
A) reploidy 
B) haploidy 
C) diploidy 
D) polyploidy 
E) proploidy

Question 10

In cystic fibrosis patients, which of thfollowing infections archronic?

Accepted Answer

A) bacterial infections of the intestine and muscles 
B) bacterial infections of the intestine and lungs 
C) bacterial infections of the blood and nerves 
D) bacterial infections of the lungs, intestine, and brain 
E) bacterial infections of the lungs and muscles 
A) bacterial infections of the intestine and muscles 
B) bacterial infections of the intestine and lungs 
C) bacterial infections of the blood and nerves 
D) bacterial infections of the lungs, intestine, and brain 
E) bacterial infections of the lungs and muscles

Question 11

If a daughter expresses an X-linkerecessivgene, shinheritethtrait from

Accepted Answer

A) her mother. 
B) her father. 
C) both parents. 
D) neither parent. 
E) her grandmother. 
A) her mother. 
B) her father. 
C) both parents. 
D) neither parent. 
E) her grandmother.

Question 12

Four of thfivanswers listebelow arrelateconditions in which abnormal numbers of chromosomes arpresent.Select thEXCEPTION.

Accepted Answer

A) monosomy 
B) aneuploidy 
C) nondisjunction 
D) complete chromosome set 
E) trisomy 
A) monosomy 
B) aneuploidy 
C) nondisjunction 
D) complete chromosome set 
E) trisomy

Question 13

Mendel's dihybricrosses (but not his monohybricrosses) showethat

Accepted Answer

A) some genes were linked together. 
B) the two alleles controlling a trait were divided equally among the gametes. 
C) alleles for different traits were inherited independently. 
D) one of the pair of alleles is dominant to the other. 
E) the crossing of two different homozygous forms will not produce any offspring in the first generation that would look like either of the parents. 
A) some genes were linked together. 
B) the two alleles controlling a trait were divided equally among the gametes. 
C) alleles for different traits were inherited independently. 
D) one of the pair of alleles is dominant to the other. 
E) the crossing of two different homozygous forms will not produce any offspring in the first generation that would look like either of the parents.

Question 14

A woman is diagnoseto havthgenetic diseasknown as Huntington's disorder.It is a rardefect causeby an autosomal dominant allele.Thchancfor any onof her children to inherit thdiseasis

Accepted Answer

A) dependent on the sex of the child. 
B) 1/3. 
C) 1/2. 
D) 3/4. 
E) 2/3. 
A) dependent on the sex of the child. 
B) 1/3. 
C) 1/2. 
D) 3/4. 
E) 2/3.

Question 15

A human X-linkegenis

Accepted Answer

A) found only in males. 
B) more frequently expressed in females. 
C) found on the Y chromosome. 
D) transmitted from father to son. 
E) found on the X chromosome. 
A) found only in males. 
B) more frequently expressed in females. 
C) found on the Y chromosome. 
D) transmitted from father to son. 
E) found on the X chromosome.

Question 16

A dihybricross of two contrasting, pure-breeding organisms

Accepted Answer

A) produces homozygous offspring. 
B) must produce a phenotype different from either pure-breeding parent. 
C) results in the disappearance of recessive traits for the first generation. 
D) takes place only in the laboratory under precisely controlled conditions. 
E) will result in the immediate formation of another pure-breeding variety. 
A) produces homozygous offspring. 
B) must produce a phenotype different from either pure-breeding parent. 
C) results in the disappearance of recessive traits for the first generation. 
D) takes place only in the laboratory under precisely controlled conditions. 
E) will result in the immediate formation of another pure-breeding variety.

Question 17

Human eycolor is an examplof a trait that

Accepted Answer

A) varies according to the geographical area. 
B) varies periodically. 
C) varies according to humidity. 
D) varies continuously. 
E) varies according to seasons. 
A) varies according to the geographical area. 
B) varies periodically. 
C) varies according to humidity. 
D) varies continuously. 
E) varies according to seasons.

Question 18

Blootypes (A, B, anO) arcontrolleby

Accepted Answer

A) sex-linked genes. 
B) linked genes. 
C) incompletely dominant genes. 
D) multiple alleles. 
E) simple dominance. 
A) sex-linked genes. 
B) linked genes. 
C) incompletely dominant genes. 
D) multiple alleles. 
E) simple dominance.

Question 19

Four of thfivanswers listebelow providevidencthat genes arlocateon chromosomes.Select thEXCEPTION.

Accepted Answer

A) The chromosome number is cut in half by meiosis. 
B) The original chromosome number is restored by fertilization. 
C) Some genes tend to be inherited together. 
D) Environmental factors may influence gene expression. 
E) There are two sets of chromosomes, one maternal and one paternal in diploid form. 
A) The chromosome number is cut in half by meiosis. 
B) The original chromosome number is restored by fertilization. 
C) Some genes tend to be inherited together. 
D) Environmental factors may influence gene expression. 
E) There are two sets of chromosomes, one maternal and one paternal in diploid form.

Question 20

If a study of several pedigrees demonstratethat two parents arnormal but their children express a trait, then thtrait is controlleby

Accepted Answer

A) a codominant gene. 
B) a simple dominant gene. 
C) a recessive gene. 
D) a sex-linked gene. 
E) none of these; no conclusion can be drawn. 
A) a codominant gene. 
B) a simple dominant gene. 
C) a recessive gene. 
D) a sex-linked gene. 
E) none of these; no conclusion can be drawn.

Exam 9: Patterns of Inheritance

GenA occurs on chromosom#5; genB occurs on chromosom#21.Therefore, thestwo portions of thchromosomCANNOT be

Which of thfollowing is responsiblfor observabltraits?

In incompletdominance,

Four of thfivanswers listebelow describthheterozygous condition.Select thEXCEPTION.

Likmany genetic disorders, galactosemia is a disruption of a metabolic pathway duto a malfunctioning

In thsecongeneration of a cross of DDRR with ddrr thmost common genotypwoulbe

A human X-linkerecessivgenmay be

In humans, skin color is commandeby several genes.Thus, skin color is a(n) __________ characteristic.

Which of thfollowing describes thcondition of a cell that has morthan 2n chromosomes?

In cystic fibrosis patients, which of thfollowing infections archronic?

If a daughter expresses an X-linkerecessivgene, shinheritethtrait from

Four of thfivanswers listebelow arrelateconditions in which abnormal numbers of chromosomes arpresent.Select thEXCEPTION.

Mendel's dihybricrosses (but not his monohybricrosses) showethat

A woman is diagnoseto havthgenetic diseasknown as Huntington's disorder.It is a rardefect causeby an autosomal dominant allele.Thchancfor any onof her children to inherit thdiseasis

A human X-linkegenis

A dihybricross of two contrasting, pure-breeding organisms

Human eycolor is an examplof a trait that

Blootypes (A, B, anO) arcontrolleby

Four of thfivanswers listebelow providevidencthat genes arlocateon chromosomes.Select thEXCEPTION.

If a study of several pedigrees demonstratethat two parents arnormal but their children express a trait, then thtrait is controlleby

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolutionunit

Population Ecology

Communities and Ecosystems

The Biosphere and Human Eff Ects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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