Question 1

Despite selection against chromosomal variations

Accepted Answer

A) related species almost always have the same karyotype. 
B) related species almost always have a different karyotype. 
C) closely related species diverge by many chromosomal rearrangements. 
D) distantly related species diverge by only a few chromosomal rearrangements. 
A) related species almost always have the same karyotype. 
B) related species almost always have a different karyotype. 
C) closely related species diverge by many chromosomal rearrangements. 
D) distantly related species diverge by only a few chromosomal rearrangements.

Question 2

During the pairing of homologs in prophase of meiosis I, the region of a chromosome bearing extra copies of a particular chromosomal region that has nothing with which to recombine with forms a

Accepted Answer

A) inversion loop. 
B) deletion heterozygote. 
C) duplication loop. 
D) deletion loop. 
A) inversion loop. 
B) deletion heterozygote. 
C) duplication loop. 
D) deletion loop.

Question 3

Which of the following is not an example of a euploid condition?

Accepted Answer

A) triploidy 
B) diploidy 
C) trisomy 21 
D) tetraploidy 
A) triploidy 
B) diploidy 
C) trisomy 21 
D) tetraploidy

Question 4

During the pairing of homologs in prophase of meiosis I, the region of a normal, nondeleted chromosome that has nothing with which to recombine forms a

Accepted Answer

A) inversion loop. 
B) deletion heterozygote. 
C) crossover suppressor. 
D) deletion loop. 
A) inversion loop. 
B) deletion heterozygote. 
C) crossover suppressor. 
D) deletion loop.

Question 5

Which of the following molecular techniques could a scientist use to help locate genes on cloned fragments of DNA with deletion mutants?

Accepted Answer

A) in situ hybridization and cross over analysis 
B) crossover and Southern blot analysis 
C) Southern blot , crossover analysis and in situ hybridization 
D) in situ hybridization and Southern blot analysis 
A) in situ hybridization and cross over analysis 
B) crossover and Southern blot analysis 
C) Southern blot , crossover analysis and in situ hybridization 
D) in situ hybridization and Southern blot analysis

Question 6

Barbara McClintock is most closely associated with which of the following?

Accepted Answer

A) the initial discovery of genetic transposition 
B) the discovery of transposable elements in corn 
C) the mutation rate in translocation heterozygotes 
D) the demonstration of the presence of transposable elements in polytene chromosomes 
A) the initial discovery of genetic transposition 
B) the discovery of transposable elements in corn 
C) the mutation rate in translocation heterozygotes 
D) the demonstration of the presence of transposable elements in polytene chromosomes

Question 7

Duplications can be created by

Accepted Answer

A) chromosomal breakage and normal repair. 
B) equal crossing over. 
C) errors in replication. 
D) single point mutations 
A) chromosomal breakage and normal repair. 
B) equal crossing over. 
C) errors in replication. 
D) single point mutations

Question 8

Which of the following sex chromosome aneuploidies is not usually seen in live births?

Accepted Answer

A) XO 
B) XXY 
C) YO 
D) XXX 
A) XO 
B) XXY 
C) YO 
D) XXX

Question 9

In Drosophila, a gynandromorph, which is composed of equal parts of male and female tissue, results from

Accepted Answer

A) an XX female losing one X chromosome during the first mitotic division after fertilization. 
B) an egg carrying an X chromosome fertilized by a Y-carrying sperm. 
C) a normal egg fertilized by both an X-carrying sperm and a Y-carrying sperm. 
D) the fusion of a female embryo with a male embryo. 
A) an XX female losing one X chromosome during the first mitotic division after fertilization. 
B) an egg carrying an X chromosome fertilized by a Y-carrying sperm. 
C) a normal egg fertilized by both an X-carrying sperm and a Y-carrying sperm. 
D) the fusion of a female embryo with a male embryo.

Question 10

Triploid organisms usually result from

Accepted Answer

A) the union of haploid and diploid gametes. 
B) unequal disjunction during embryogenesis. 
C) propagation of fused cell lines. 
D) fusion of three gametes simultaneously. 
A) the union of haploid and diploid gametes. 
B) unequal disjunction during embryogenesis. 
C) propagation of fused cell lines. 
D) fusion of three gametes simultaneously.

Question 11

Any DNA segment that moves about in the genome

Accepted Answer

The answer of Any DNA segment that moves about in...

Question 12

The type of chromosomal rearrangement that reorganizes the DNA sequence within one chromosome is known as a(n)

Accepted Answer

A) inversion. 
B) duplication. 
C) deletion. 
D) translocation. 
A) inversion. 
B) duplication. 
C) deletion. 
D) translocation.

Question 13

In general, which type of mutation usually has the greatest probability of lethality?

Accepted Answer

A) inversion 
B) duplication 
C) deletion 
D) translocation 
A) inversion 
B) duplication 
C) deletion 
D) translocation

Question 14

A type of rearrangement that results in a loss of genetic material from the genome

Accepted Answer

The answer of A type of rearrangement that results in...

Question 15

Which is not a typical characteristic of transposable elements?

Accepted Answer

A) typically smaller than 50 bp 
B) may be present in a genome from one to thousands of times 
C) found only in a select group of organisms 
D) need not be sequences that do something for the organism 
A) typically smaller than 50 bp 
B) may be present in a genome from one to thousands of times 
C) found only in a select group of organisms 
D) need not be sequences that do something for the organism

Question 16

Which of the following is not an example of an aneuploidy?

Accepted Answer

A) monosomy 
B) tetraploid 
C) trisomy 
D) tetrasomy 
A) monosomy 
B) tetraploid 
C) trisomy 
D) tetrasomy

Question 17

The condition of semisterility is most closely associated with

Accepted Answer

A) chromosomal duplications. 
B) pericentric inversions. 
C) translocation heterozygotes. 
D) translocation homozygotes. 
A) chromosomal duplications. 
B) pericentric inversions. 
C) translocation heterozygotes. 
D) translocation homozygotes.

Question 18

A piece of genetic material that moves from place to place in the genome

Accepted Answer

The answer of A piece of genetic material that moves...

Question 19

Of the following segregation patterns for chromosomes that have undergone reciprocal translocation, which one is most likely to result in a normal zygote?

Accepted Answer

A) alternate 
B) adjacent-1 
C) adjacent-2 
D) nondisjunction 
A) alternate 
B) adjacent-1 
C) adjacent-2 
D) nondisjunction

Question 20

During mitosis, if all of the chromosomes in a diploid tissue fail to separate during anaphase one daughter cell will be

Accepted Answer

A) monoploid. 
B) tetrasomic. 
C) triploid. 
D) tetraploid. 
A) monoploid. 
B) tetrasomic. 
C) triploid. 
D) tetraploid.

Exam 12: Chromosomal Rearrangements and Changes in Chromosome Number

Despite selection against chromosomal variations

During the pairing of homologs in prophase of meiosis I, the region of a chromosome bearing extra copies of a particular chromosomal region that has nothing with which to recombine with forms a

Which of the following is not an example of a euploid condition?

During the pairing of homologs in prophase of meiosis I, the region of a normal, nondeleted chromosome that has nothing with which to recombine forms a

Which of the following molecular techniques could a scientist use to help locate genes on cloned fragments of DNA with deletion mutants?

Barbara McClintock is most closely associated with which of the following?

Duplications can be created by

Which of the following sex chromosome aneuploidies is not usually seen in live births?

In Drosophila, a gynandromorph, which is composed of equal parts of male and female tissue, results from

Triploid organisms usually result from

Any DNA segment that moves about in the genome

The type of chromosomal rearrangement that reorganizes the DNA sequence within one chromosome is known as a(n)

In general, which type of mutation usually has the greatest probability of lethality?

A type of rearrangement that results in a loss of genetic material from the genome

Which is not a typical characteristic of transposable elements?

Which of the following is not an example of an aneuploidy?

The condition of semisterility is most closely associated with

A piece of genetic material that moves from place to place in the genome

Of the following segregation patterns for chromosomes that have undergone reciprocal translocation, which one is most likely to result in a normal zygote?

During mitosis, if all of the chromosomes in a diploid tissue fail to separate during anaphase one daughter cell will be

Genetics: The Study of Biological Information

Mendels Principles of Heredity

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

DNA Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: The Flow of Information From DNA to RNA to Protein

Digital Analysis of Genomes

Analyzing Genomic Information

The Eukaryotic Chromosome

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

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