Question 1

In which way can deletions cause abnormal phenotypes?

Accepted Answer

A) If the centromere is deleted,then the whole chromosome could be lost during meiosis. 
B) In a heterozygous deletion,the gene dosage can be affected. 
C) A recessive mutation could be expressed if the wild-type allele is deleted. 
D) all of the above 
A) If the centromere is deleted,then the whole chromosome could be lost during meiosis. 
B) In a heterozygous deletion,the gene dosage can be affected. 
C) A recessive mutation could be expressed if the wild-type allele is deleted. 
D) all of the above D

Question 2

One species has 2n = 32 chromosomes and another species has 24 chromosomes.In an allotriploid of these two species,how many chromosomes would there be?

Accepted Answer

A) 46 or 40 
B) 56 
C) 84 
D) 48 or 36 
A) 46 or 40 
B) 56 
C) 84 
D) 48 or 36 A

Question 3

Which is NOT a type of chromosomal mutation?

Accepted Answer

A) chromosome rearrangement 
B) aneuploidy 
C) polyploidy 
D) point mutation 
A) chromosome rearrangement 
B) aneuploidy 
C) polyploidy 
D) point mutation D

Question 4

A diploid species has 2n = 52 chromosomes.If you found a monosomy in a member of this species,how many chromosomes would it have?

Accepted Answer

A) 104 
B) 54 
C) 53 
D) 51 
E) 52 
A) 104 
B) 54 
C) 53 
D) 51 
E) 52

Question 5

Which is NOT a way that translocations affect a phenotype?

Accepted Answer

A) Translocated genes may become under the control of different regulatory sequences. 
B) Translocations can cause regions of the chromosome to be duplicated. 
C) Translocation breaks can disrupt existing gene function. 
D) Translocations can influence karyotype evolution. 
E) all of the above 
A) Translocated genes may become under the control of different regulatory sequences. 
B) Translocations can cause regions of the chromosome to be duplicated. 
C) Translocation breaks can disrupt existing gene function. 
D) Translocations can influence karyotype evolution. 
E) all of the above

Question 6

Aneuploids of which chromosomes are less likely to result in a live birth?

Accepted Answer

A) larger autosomes 
B) small autosomes 
C) sex chromosomes 
D) all of the above 
E) none of the above 
A) larger autosomes 
B) small autosomes 
C) sex chromosomes 
D) all of the above 
E) none of the above

Question 7

The expression of some genes is dependent upon their chromosomal position.Which kind of chromosome rearrangement might cause a position-effect phenotype?

Accepted Answer

A) deletion 
B) duplication 
C) inversion 
D) all of the above 
A) deletion 
B) duplication 
C) inversion 
D) all of the above

Question 8

Can chromosome duplications cause problems for an organism? Why?

Accepted Answer

A) Yes.Duplicated regions require DNA to be replicated,which delays the cell cycle and wastes energy. 
B) Yes.Duplicated regions increase gene dosage,which affects processes like development that require specific amounts of protein for completion. 
C) No.Duplicated regions of chromosomes are looped out and lost during meiosis. 
D) No.Duplicated regions of chromosomes do NOT affect gene dosage,because the cell can compensate for extra copies of genes. 
A) Yes.Duplicated regions require DNA to be replicated,which delays the cell cycle and wastes energy. 
B) Yes.Duplicated regions increase gene dosage,which affects processes like development that require specific amounts of protein for completion. 
C) No.Duplicated regions of chromosomes are looped out and lost during meiosis. 
D) No.Duplicated regions of chromosomes do NOT affect gene dosage,because the cell can compensate for extra copies of genes.

Question 9

If a diploid species 2nhas 52 chromosomes,how many chromosomes would a triploid have?

Accepted Answer

A) 26 
B) 52 
C) 78 
D) 104 
E) 156 
A) 26 
B) 52 
C) 78 
D) 104 
E) 156

In which way can deletions cause abnormal phenotypes?

One species has 2n = 32 chromosomes and another species has 24 chromosomes.In an allotriploid of these two species,how many chromosomes would there be?

Which is NOT a type of chromosomal mutation?

A diploid species has 2n = 52 chromosomes.If you found a monosomy in a member of this species,how many chromosomes would it have?

Which is NOT a way that translocations affect a phenotype?

Aneuploids of which chromosomes are less likely to result in a live birth?

The expression of some genes is dependent upon their chromosomal position.Which kind of chromosome rearrangement might cause a position-effect phenotype?

Can chromosome duplications cause problems for an organism? Why?

If a diploid species 2nhas 52 chromosomes,how many chromosomes would a triploid have?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Transcription and Rna Processing

From DNA to Proteins: Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters

Exam 7: Chromosome Variation

In which way can deletions cause abnormal phenotypes?

One species has 2n = 32 chromosomes and another species has 24 chromosomes.In an allotriploid of these two species,how many chromosomes would there be?

Which is NOT a type of chromosomal mutation?

A diploid species has 2n = 52 chromosomes.If you found a monosomy in a member of this species,how many chromosomes would it have?

Which is NOT a way that translocations affect a phenotype?

Aneuploids of which chromosomes are less likely to result in a live birth?

The expression of some genes is dependent upon their chromosomal position.Which kind of chromosome rearrangement might cause a position-effect phenotype?

Can chromosome duplications cause problems for an organism? Why?

If a diploid species 2nhas 52 chromosomes,how many chromosomes would a triploid have?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Transcription and Rna Processing

From DNA to Proteins: Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters