Question 1

The centromere of human chromosome 15 creates a long arm and a very short arm.Therefore,this chromosome is

Accepted Answer

A)  telocentric. 
B)  acrocentric. 
C)  submetacentric. 
D)  metacentric. 
E)  nanocentric. 
A)  telocentric. 
B)  acrocentric. 
C)  submetacentric. 
D)  metacentric. 
E)  nanocentric. B

Question 2

People with Klinefelter syndrome have which chromosome constitution?

Accepted Answer

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

Question 3

The DNA sequence that is repeated many times in a telomere is

Accepted Answer

A)  GAGTCT. 
B)  UUAGGG. 
C)  AAUCCC. 
D)  AATCCC. 
E)  TTAGGG. 
A)  GAGTCT. 
B)  UUAGGG. 
C)  AAUCCC. 
D)  AATCCC. 
E)  TTAGGG. E

Question 4

Spindle fibers (microtubules)attach to a chromosome's _______ during mitosis.

Accepted Answer

A)  centromere 
B)  telomere 
C)  genomere 
D)  euchromatin 
E)  tips 
A)  centromere 
B)  telomere 
C)  genomere 
D)  euchromatin 
E)  tips

Question 5

A karyotype that uses FISH that shows two chromosomes,each with two colors,but in the opposite patterns,most likely indicates a

Accepted Answer

A)  Robertsonian translocation. 
B)  pericentric inversion. 
C)  paracentric inverson. 
D)  reciprocal translocation. 
E)  isochromosome. 
A)  Robertsonian translocation. 
B)  pericentric inversion. 
C)  paracentric inverson. 
D)  reciprocal translocation. 
E)  isochromosome.

Question 6

Heterochromatic regions at the ends of chromosomes are

Accepted Answer

A)  centromeres. 
B)  euchromatin. 
C)  telomeres. 
D)  satellites. 
E)  DNA hubs. 
A)  centromeres. 
B)  euchromatin. 
C)  telomeres. 
D)  satellites. 
E)  DNA hubs.

Question 7

A man with trisomy 21 could pass Down syndrome to offspring if he

Accepted Answer

A)  produces sperm that have two copies of chromosome 21. 
B)  produces sperm lacking chromosome 21. 
C)  also has Turner syndrome. 
D)  is a carrier of a deletion for chromosome 21. 
E)  drinks too much alcohol just before the child is conceived. 
A)  produces sperm that have two copies of chromosome 21. 
B)  produces sperm lacking chromosome 21. 
C)  also has Turner syndrome. 
D)  is a carrier of a deletion for chromosome 21. 
E)  drinks too much alcohol just before the child is conceived.

Question 8

Polyploidy can result when

Accepted Answer

A)  a translocation occurs between two chromosomes. 
B)  one pair of homologous chromosomes does not separate during meiosis. 
C)  a developing gamete is haploid. 
D)  a haploid sperm fertilizes a diploid egg. 
E)  two ring chromosomes are lost. 
A)  a translocation occurs between two chromosomes. 
B)  one pair of homologous chromosomes does not separate during meiosis. 
C)  a developing gamete is haploid. 
D)  a haploid sperm fertilizes a diploid egg. 
E)  two ring chromosomes are lost.

Question 9

Chorionic villus sampling differs from amniocentesis in that for CVS

Accepted Answer

A)  cells must first be cultured. 
B)  biochemical tests can be performed on the sample. 
C)  a karyotype is prepared directly from collected cells. 
D)  cells do not directly descend from the fertilized ovum. 
E)  the pregnant woman must be past her 12th week of pregnancy. 
A)  cells must first be cultured. 
B)  biochemical tests can be performed on the sample. 
C)  a karyotype is prepared directly from collected cells. 
D)  cells do not directly descend from the fertilized ovum. 
E)  the pregnant woman must be past her 12th week of pregnancy.

Question 10

Amniocentesis cannot be used to detect fetal

Accepted Answer

A)  gender. 
B)  intelligence. 
C)  chromosomal abnormalities. 
D)  biochemicals that indicate an inborn error of metabolism. 
E)  total chromosome number. 
A)  gender. 
B)  intelligence. 
C)  chromosomal abnormalities. 
D)  biochemicals that indicate an inborn error of metabolism. 
E)  total chromosome number.

Question 11

________ syndrome can only result from non-disjunction in the male and female.

Accepted Answer

A)  YO 
B)  XO 
C)  XXY 
D)  XXX 
E)  XXYY syndrome 
A)  YO 
B)  XO 
C)  XXY 
D)  XXX 
E)  XXYY syndrome

Question 12

CVS reveals a fetus has the karyotype 47,XYY.What is the diagnosis?

Accepted Answer

A)  normal male 
B)  Klinefelter syndrome 
C)  Edward syndrome 
D)  Jacobs syndrome 
E)  Down syndrome 
A)  normal male 
B)  Klinefelter syndrome 
C)  Edward syndrome 
D)  Jacobs syndrome 
E)  Down syndrome

Question 13

A chromosome consists of

Accepted Answer

A)  mostly protein and RNA with a small amount of DNA. 
B)  mostly DNA and proteins with a small amount of RNA. 
C)  about equal proportions of DNA, RNA, and protein. 
D)  DNA only. 
E)  mostly DNA and RNA and a small amount of protein. 
A)  mostly protein and RNA with a small amount of DNA. 
B)  mostly DNA and proteins with a small amount of RNA. 
C)  about equal proportions of DNA, RNA, and protein. 
D)  DNA only. 
E)  mostly DNA and RNA and a small amount of protein.

Question 14

The area between the protein-encoding rich part of a chromosome and called a

Accepted Answer

A)  submetacentric. 
B)  subtelomere. 
C)  subcentromere. 
D)  subchromatin. 
E)  euchromomere. 
A)  submetacentric. 
B)  subtelomere. 
C)  subcentromere. 
D)  subchromatin. 
E)  euchromomere.

Question 15

Chromosome microarray analysis is used to detect _________ in a fetus.

Accepted Answer

A)  gender 
B)  intelligence 
C)  chromosome number 
D)  copy number variants 
E)  the number of protein-encoding genes 
A)  gender 
B)  intelligence 
C)  chromosome number 
D)  copy number variants 
E)  the number of protein-encoding genes

Question 16

Chromosomes in karyotypes are arranged and ordered by

Accepted Answer

A)  gene density. 
B)  telomere length. 
C)  centromere position. 
D)  length. 
E)  width. 
A)  gene density. 
B)  telomere length. 
C)  centromere position. 
D)  length. 
E)  width.

Question 17

A chromosome that results when the centromere splits in the wrong plane during meiosis,forming identical arms,is a(n)

Accepted Answer

A)  ring chromosome. 
B)  metachromosome. 
C)  parachromosome. 
D)  isochromosome. 
E)  tetraploid chromosome. 
A)  ring chromosome. 
B)  metachromosome. 
C)  parachromosome. 
D)  isochromosome. 
E)  tetraploid chromosome.

Question 18

A karyotype with an extra set of chromosomes indicates

Accepted Answer

A)  aneuploidy. 
B)  polyploidy. 
C)  diploidy. 
D)  haploidy. 
E)  paraploidy. 
A)  aneuploidy. 
B)  polyploidy. 
C)  diploidy. 
D)  haploidy. 
E)  paraploidy.

Question 19

The type of chromosome abnormality that yields a long chromosome consisting of most of two acrocentric chromosomes is a(n)

Accepted Answer

A)  Robertsonian translocation. 
B)  pericentric inversion. 
C)  paracentric inverson. 
D)  reciprocal translocation. 
E)  isochromosome. 
A)  Robertsonian translocation. 
B)  pericentric inversion. 
C)  paracentric inverson. 
D)  reciprocal translocation. 
E)  isochromosome.

Question 20

In the earliest karyotypes,chromosomes were distinguished by

Accepted Answer

A)  specific size order. 
B)  general size classes. 
C)  banding patterns. 
D)  DNA probes to specific DNA sequences. 
E)  stage of the cell cycle. 
A)  specific size order. 
B)  general size classes. 
C)  banding patterns. 
D)  DNA probes to specific DNA sequences. 
E)  stage of the cell cycle.

Exam 13: Chromosomes

The centromere of human chromosome 15 creates a long arm and a very short arm.Therefore,this chromosome is

People with Klinefelter syndrome have which chromosome constitution?

The DNA sequence that is repeated many times in a telomere is

Spindle fibers (microtubules)attach to a chromosome's _______ during mitosis.

A karyotype that uses FISH that shows two chromosomes,each with two colors,but in the opposite patterns,most likely indicates a

Heterochromatic regions at the ends of chromosomes are

A man with trisomy 21 could pass Down syndrome to offspring if he

Polyploidy can result when

Chorionic villus sampling differs from amniocentesis in that for CVS

Amniocentesis cannot be used to detect fetal

________ syndrome can only result from non-disjunction in the male and female.

CVS reveals a fetus has the karyotype 47,XYY.What is the diagnosis?

A chromosome consists of

The area between the protein-encoding rich part of a chromosome and called a

Chromosome microarray analysis is used to detect _________ in a fetus.

Chromosomes in karyotypes are arranged and ordered by

A chromosome that results when the centromere splits in the wrong plane during meiosis,forming identical arms,is a(n)

A karyotype with an extra set of chromosomes indicates

The type of chromosome abnormality that yields a long chromosome consisting of most of two acrocentric chromosomes is a(n)

In the earliest karyotypes,chromosomes were distinguished by

Overview of Genetics

Cells

Meiosis and Development

Single-Gene Inheritance

Beyond Mendels Law

Matters of Sex

Multifactorial Traits

Genetics of Behavior

DNA Structure and Replication

Gene Action: From Dna to Protein

Gene Expression and Epigenetics

Gene Mutation

Constant Allele Frequencies

Changing Allele Frequencies

Human Ancestry

Genetics of Immunity

Genetics of Cancer

Genetic Technologies: Amplifying, Modifying, and Monitoring DNA

Genetic Testing and Treatment

Reproductive Technologies

Genomics

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