Question 1

Which of thfollowing statements is FALSE?

Accepted Answer

A) Crossing over tends to reduce the frequency that two linked genes are inherited together. 
B) Independent assortment of homologous chromosomes during meiosis increases variation. 
C) Crossing over leads to variation. 
D) Abnormal number or structure of chromosomes may influence the course of evolution. 
E) The closer together genes are found on a chromosome, the greater is a chance that crossing over will occur between them. 
A) Crossing over tends to reduce the frequency that two linked genes are inherited together. 
B) Independent assortment of homologous chromosomes during meiosis increases variation. 
C) Crossing over leads to variation. 
D) Abnormal number or structure of chromosomes may influence the course of evolution. 
E) The closer together genes are found on a chromosome, the greater is a chance that crossing over will occur between them.

Question 2

Four of thfivanswers listebelow arterms relateto a normal set of chromosomes by quantity.Select thEXCEPTION.

Accepted Answer

A) aneuploid 
B) haploid 
C) tetraploid 
D) polyploid 
E) diploid 
A) aneuploid 
B) haploid 
C) tetraploid 
D) polyploid 
E) diploid

Question 3

Four of thfivanswers listebelow describthgenmakup.Select thEXCEPTION.

Accepted Answer

A) pure-breeding 
B) homozygous 
C) heterozygous 
D) carrier 
E) phenotype 
A) pure-breeding 
B) homozygous 
C) heterozygous 
D) carrier 
E) phenotype

Question 4

Which of thfollowing woulbconsiderea carrier of a sex-linkerecessivdefect?

Accepted Answer

A) a man with the defect 
B) a woman with the defect 
C) a father of a son with the defect 
D) the normal daughter whose father had the defect 
E) a son of two unaffected parents 
A) a man with the defect 
B) a woman with the defect 
C) a father of a son with the defect 
D) the normal daughter whose father had the defect 
E) a son of two unaffected parents

Question 5

ThABO blootypes hav__________ different genotypes.

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 12 
E) 16 
A) 4 
B) 6 
C) 8 
D) 12 
E) 16

Question 6

If all thoffspring of a cross hathgenotypAaBb, thparent of thcross woulmost likely be

Accepted Answer

A) AABB x aabb. 
B) AAbb x aaBB. 
C) AaBb x AaBb. 
D) Aabb x aaBb. 
E) AABB x aabb or AAbb x aaBB. 
A) AABB x aabb. 
B) AAbb x aaBB. 
C) AaBb x AaBb. 
D) Aabb x aaBb. 
E) AABB x aabb or AAbb x aaBB.

Question 7

Thcondition occurring when an organishas a 2n+1 chromosomcomposition is known as

Accepted Answer

A) monozomy. 
B) deletion. 
C) diploid. 
D) aneuploidy. 
E) both deletion and aneuploidy. 
A) monozomy. 
B) deletion. 
C) diploid. 
D) aneuploidy. 
E) both deletion and aneuploidy.

Question 8

Ththeory of independent assortment

Accepted Answer

A) cannot be demonstrated in a monohybrid cross. 
B) is illustrated by the behavior of linked genes. 
C) indicates that the expression of one gene is independent of the action of another gene. 
D) states that alleles for the same characteristic separate during meiosis. 
E) is negated by the phenomenon of epistasis. 
A) cannot be demonstrated in a monohybrid cross. 
B) is illustrated by the behavior of linked genes. 
C) indicates that the expression of one gene is independent of the action of another gene. 
D) states that alleles for the same characteristic separate during meiosis. 
E) is negated by the phenomenon of epistasis.

Question 9

Amniocentesis involves sampling

Accepted Answer

A) the fetus directly. 
B) the fetal cells floating in the amniotic fluid. 
C) sperm. 
D) blood cells. 
E) placental cells. 
A) the fetus directly. 
B) the fetal cells floating in the amniotic fluid. 
C) sperm. 
D) blood cells. 
E) placental cells.

Question 10

Which of thfollowing woulban exception to ththeory of independent assortment?

Accepted Answer

A) dominance 
B) recessiveness 
C) incomplete dominance 
D) pleiotropy 
E) linkage 
A) dominance 
B) recessiveness 
C) incomplete dominance 
D) pleiotropy 
E) linkage

Question 11

Syndrommeans

Accepted Answer

A) a chromosome disorder. 
B) a simple genetic disease. 
C) a set of symptoms that occur together. 
D) an incurable disease. 
E) a rare inborn defect. 
A) a chromosome disorder. 
B) a simple genetic disease. 
C) a set of symptoms that occur together. 
D) an incurable disease. 
E) a rare inborn defect.

Question 12

Males tento baffectein greater numbers by X-linkerecessivgenetic disorders than arfemales because

Accepted Answer

A) females have two dominant genes for the disorder. 
B) males have only one recessive gene for the disorder. 
C) males have a double dose of the gene. 
D) Y chromosomes are not as strong as X chromosomes. 
E) males have three copies of the X chromosome. 
A) females have two dominant genes for the disorder. 
B) males have only one recessive gene for the disorder. 
C) males have a double dose of the gene. 
D) Y chromosomes are not as strong as X chromosomes. 
E) males have three copies of the X chromosome.

Question 13

Color blindness is an X-linketrait in humans.If a color-blinwoman marries a man with normal vision, thchildren will be

Accepted Answer

A) all color-blind daughters, but normal sons. 
B) all color-blind sons, but carrier daughters. 
C) all normal sons, but carrier daughters. 
D) all color-blind children. 
E) all normal children. 
A) all color-blind daughters, but normal sons. 
B) all color-blind sons, but carrier daughters. 
C) all normal sons, but carrier daughters. 
D) all color-blind children. 
E) all normal children.

Question 14

Four of thfivanswers listebelow describsets of chromosomes with extra numbers.Select thEXCEPTION.

Accepted Answer

A) polyploid 
B) tetraploid 
C) diploid 
D) triploid 
E) pentaploid 
A) polyploid 
B) tetraploid 
C) diploid 
D) triploid 
E) pentaploid

Question 15

Various forms of a genat a given locus arcalled

Accepted Answer

A) chiasma. 
B) alleles. 
C) autosomes. 
D) loci. 
E) chromatids. 
A) chiasma. 
B) alleles. 
C) autosomes. 
D) loci. 
E) chromatids.

Question 16

If nondisjunction occurs during anaphasI of meiosis,

Accepted Answer

A) the resulting sex cells would be heterogametes. 
B) one-half of the resulting gametes will be diploid for one pair of chromosomes. 
C) diploid cells will be produced. 
D) all gametes would lack a chromosome, and these gametes would be infertile. 
E) the gamete is incapable of being fertilized. 
A) the resulting sex cells would be heterogametes. 
B) one-half of the resulting gametes will be diploid for one pair of chromosomes. 
C) diploid cells will be produced. 
D) all gametes would lack a chromosome, and these gametes would be infertile. 
E) the gamete is incapable of being fertilized.

Question 17

Thsecongeneration ration of a monohybricross is

Accepted Answer

A) 1:1. 
B) 2:1. 
C) 9:3:3:1. 
D) 1:2:1. 
E) 3:1. 
A) 1:1. 
B) 2:1. 
C) 9:3:3:1. 
D) 1:2:1. 
E) 3:1.

Question 18

Diploiorganisms

Accepted Answer

A) have corresponding alleles on homologous chromosomes. 
B) are usually the result of the fusion of two haploid gametes. 
C) have two sets of chromosomes. 
D) have pairs of homologous chromosomes. 
E) have all of these. 
A) have corresponding alleles on homologous chromosomes. 
B) are usually the result of the fusion of two haploid gametes. 
C) have two sets of chromosomes. 
D) have pairs of homologous chromosomes. 
E) have all of these.

Question 19

When two alleles of thsamgenaridentical, thindividual carrying thosalleles is saito be

Accepted Answer

A) dominant. 
B) heterozygous. 
C) zygotes. 
D) autosomes. 
E) homozygous. 
A) dominant. 
B) heterozygous. 
C) zygotes. 
D) autosomes. 
E) homozygous.

Question 20

Galactosemia

Accepted Answer

A) is an X-linked recessive trait expressed more commonly in males. 
B) occurs more frequently in some ethnic groups than others. 
C) is an autosomal recessive inheritance. 
D) must be homozygous to be expressed. 
E) is an autosomal recessive inheritance and must be homozygous to be expressed. 
A) is an X-linked recessive trait expressed more commonly in males. 
B) occurs more frequently in some ethnic groups than others. 
C) is an autosomal recessive inheritance. 
D) must be homozygous to be expressed. 
E) is an autosomal recessive inheritance and must be homozygous to be expressed.

Exam 9: Patterns of Inheritance

Which of thfollowing statements is FALSE?

Four of thfivanswers listebelow arterms relateto a normal set of chromosomes by quantity.Select thEXCEPTION.

Four of thfivanswers listebelow describthgenmakup.Select thEXCEPTION.

Which of thfollowing woulbconsiderea carrier of a sex-linkerecessivdefect?

ThABO blootypes hav__________ different genotypes.

If all thoffspring of a cross hathgenotypAaBb, thparent of thcross woulmost likely be

Thcondition occurring when an organishas a 2n+1 chromosomcomposition is known as

Ththeory of independent assortment

Amniocentesis involves sampling

Which of thfollowing woulban exception to ththeory of independent assortment?

Syndrommeans

Males tento baffectein greater numbers by X-linkerecessivgenetic disorders than arfemales because

Color blindness is an X-linketrait in humans.If a color-blinwoman marries a man with normal vision, thchildren will be

Four of thfivanswers listebelow describsets of chromosomes with extra numbers.Select thEXCEPTION.

Various forms of a genat a given locus arcalled

If nondisjunction occurs during anaphasI of meiosis,

Thsecongeneration ration of a monohybricross is

Diploiorganisms

When two alleles of thsamgenaridentical, thindividual carrying thosalleles is saito be

Galactosemia

Invitation to Biology

Molecules of Life

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How Cells Reproduce

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Early Life Forms and the Viruses

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Population Ecology

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The Biosphere and Human Eff Ects

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Circulation and Respiration

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Neural Control and the Senses

Endocrine Control

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Plant Reproduction and Development

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