Question 1

If nondisjunction occurs during meiosis I,____.

Accepted Answer

A)  two gametes will be normal and two will be missing one chromosome 
B)  two gametes will be normal and two will have one extra chromosome 
C)  three gametes will be normal and one will have two extra chromosomes 
D)  all gametes will be normal 
E)  all gametes will be abnormal 
A)  two gametes will be normal and two will be missing one chromosome 
B)  two gametes will be normal and two will have one extra chromosome 
C)  three gametes will be normal and one will have two extra chromosomes 
D)  all gametes will be normal 
E)  all gametes will be abnormal E

Question 2

The FRAX A site near the tip of the long arm of the X chromosome is associated with a form of intellectual disability known as Martin-Bell syndrome,or ____________________.

Accepted Answer

fragile-X syndrome
fragile-X

Question 3

Define the term translocation and describe the two major types and their phenotypic consequences.

Accepted Answer

Translocations move part of a chromosome to another,nonhomologous chromosome.There are two major types of translocations: reciprocal translocations and Robertsonian translocations.In a reciprocal translocation,two nonhomologous chromosomes exchange parts.No genetic information is gained or lost from the cell in the exchange,but genes are moved to new chromosomal locations.In some cases,there are no phenotypic effects,and the translocation is passed through a family for generations.Robertsonian translocations can produce genetically unbalanced gametes with duplicated or deleted chromosomal segments that can result in embryonic death or abnormal offspring.

Question 4

Leukemia is often associated with chromosomal translocations.

Accepted Answer

A) True 
 B)False

Question 5

The major physical symptom associated with Klinefelter syndrome is ____.

Accepted Answer

A)  facial deformation 
B)  fertility problems 
C)  short stature 
D)  intellectual disability 
E)  heart abnormalities 
A)  facial deformation 
B)  fertility problems 
C)  short stature 
D)  intellectual disability 
E)  heart abnormalities

Question 6

Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation.

Accepted Answer

A) True 
 B)False

Question 7

About ____ percent of all newborns are affected with an abnormal karyotype.

Accepted Answer

A)  0.001 
B)  0.01 
C)  0.05 
D)  0.5 
E)  1.0 
A)  0.001 
B)  0.01 
C)  0.05 
D)  0.5 
E)  1.0

Question 8

The karyotype designation for an infant with a deletion in the short arm of chromosome 5 (cri du chat syndrome)is ____________________

Accepted Answer

The answer of The karyotype designation for an infant with...

Question 9

A chromosome whose centromere is placed very close to,but not at,one end is called a(n)____________________ chromosome.

Accepted Answer

The answer of A chromosome whose centromere is placed very...

Question 10

A chromosome that has a centrally-placed centromere is called ____________________.

Accepted Answer

The answer of A chromosome that has a centrally-placed centromere...

Question 11

Deletion of an entire autosome ____.

Accepted Answer

A)  causes XYY syndrome 
B)  causes Down syndrome 
C)  causes no physical symptoms 
D)  is lethal 
E)  is called polyploidy 
A)  causes XYY syndrome 
B)  causes Down syndrome 
C)  causes no physical symptoms 
D)  is lethal 
E)  is called polyploidy

Question 12

Part of a chromosome moves to another,nonhomologous chromosome during ____________________.

Accepted Answer

The answer of Part of a chromosome moves to another,nonhomologous...

Question 13

Describe two processes that would result in a triploid zygote.

Accepted Answer

One process resulting in a triploid zygo

Question 14

The most common type of polyploidy in humans is ____.

Accepted Answer

A)  trisomy 
B)  monosomy 
C)  triploidy 
D)  tetraploidy 
E)  haploidy 
A)  trisomy 
B)  monosomy 
C)  triploidy 
D)  tetraploidy 
E)  haploidy

Question 15

The letters G,Q,R,and C,used to describe the appearance of chromosomes,refer to the ____.

Accepted Answer

A)  position of the bands 
B)  staining procedure used to reveal the bands 
C)  number of arms per chromosome 
D)  number of centromeres per chromosome 
E)  position of the centromeres 
A)  position of the bands 
B)  staining procedure used to reveal the bands 
C)  number of arms per chromosome 
D)  number of centromeres per chromosome 
E)  position of the centromeres

Question 16

One technique for chromosome analysis is called ____________________,which uses chromosome-specific DNA sequences attached to fluorescent dyes to target specific chromosomal regions.

Accepted Answer

The answer of One technique for chromosome analysis is called...

Question 17

Explain why geneticists believe that almost all chromosomally abnormal embryos and fetuses are eliminated as pregnancy progresses.

Accepted Answer

Comparison of the number of chromosomal

Question 18

Trisomy 21 is the only autosomal trisomy that allows survival into adulthood.

Accepted Answer

A) True 
 B)False

Question 19

Viral infections are not considered a risk factor for autosomal trisomy because a virus cannot affect human chromosome arrangement.

Accepted Answer

A) True 
 B)False

Question 20

One important difference between amniocentesis and chorionic villus sampling is that ____.

Accepted Answer

A)  chorionic villus sampling is more routine 
B)  amniocentesis can diagnose chromosome disorders, while chorionic villus sampling cannot 
C)  chorionic villus sampling can be done earlier in the pregnancy than amniocentesis 
D)  maternal risks are higher with chorionic villus sampling 
E)  the risk of miscarriage is higher with amniocentesis than with chorionic villus sampling 
A)  chorionic villus sampling is more routine 
B)  amniocentesis can diagnose chromosome disorders, while chorionic villus sampling cannot 
C)  chorionic villus sampling can be done earlier in the pregnancy than amniocentesis 
D)  maternal risks are higher with chorionic villus sampling 
E)  the risk of miscarriage is higher with amniocentesis than with chorionic villus sampling

If nondisjunction occurs during meiosis I,____.

The FRAX A site near the tip of the long arm of the X chromosome is associated with a form of intellectual disability known as Martin-Bell syndrome,or ____________________.

Define the term translocation and describe the two major types and their phenotypic consequences.

Leukemia is often associated with chromosomal translocations.

The major physical symptom associated with Klinefelter syndrome is ____.

Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation.

About ____ percent of all newborns are affected with an abnormal karyotype.

The karyotype designation for an infant with a deletion in the short arm of chromosome 5 (cri du chat syndrome)is ____________________

A chromosome whose centromere is placed very close to,but not at,one end is called a(n)____________________ chromosome.

A chromosome that has a centrally-placed centromere is called ____________________.

Deletion of an entire autosome ____.

Part of a chromosome moves to another,nonhomologous chromosome during ____________________.

Describe two processes that would result in a triploid zygote.

The most common type of polyploidy in humans is ____.

The letters G,Q,R,and C,used to describe the appearance of chromosomes,refer to the ____.

One technique for chromosome analysis is called ____________________,which uses chromosome-specific DNA sequences attached to fluorescent dyes to target specific chromosomal regions.

Explain why geneticists believe that almost all chromosomally abnormal embryos and fetuses are eliminated as pregnancy progresses.

Trisomy 21 is the only autosomal trisomy that allows survival into adulthood.

Viral infections are not considered a risk factor for autosomal trisomy because a virus cannot affect human chromosome arrangement.

One important difference between amniocentesis and chorionic villus sampling is that ____.

A Perspective on Human Genetics

Cells and Cell Division

Transmission of Genes from Generation to Generation

Pedigree Analysis in Human Genetics

The Inheritance of Complex Traits

Development and Sex Determination

The Structure - Replication - and Chromosomal Organization of DNA

Gene Expression and Gene Regulation

From Proteins to Phenotypes

Genome Alterations - Mutation and Epigenetics

Genes and Cancer

An Introduction to Genetic Technology

Biotechnology and Society

Genomes and Genomics

Reproductive Technology - Genetic Testing - and Gene Therapy

Genes and The Immune System

Genetics of Behavior

Population Genetics and Human Evolution

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Exam 6: Cytogenetics - Karyotypes and Chromosome Aberrations

If nondisjunction occurs during meiosis I,____.

The FRAX A site near the tip of the long arm of the X chromosome is associated with a form of intellectual disability known as Martin-Bell syndrome,or ____________________.

Define the term translocation and describe the two major types and their phenotypic consequences.

Leukemia is often associated with chromosomal translocations.

The major physical symptom associated with Klinefelter syndrome is ____.

Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation.

About ____ percent of all newborns are affected with an abnormal karyotype.

The karyotype designation for an infant with a deletion in the short arm of chromosome 5 (cri du chat syndrome)is ____________________

A chromosome whose centromere is placed very close to,but not at,one end is called a(n)____________________ chromosome.

A chromosome that has a centrally-placed centromere is called ____________________.

Deletion of an entire autosome ____.

Part of a chromosome moves to another,nonhomologous chromosome during ____________________.

Describe two processes that would result in a triploid zygote.

The most common type of polyploidy in humans is ____.

The letters G,Q,R,and C,used to describe the appearance of chromosomes,refer to the ____.

One technique for chromosome analysis is called ____________________,which uses chromosome-specific DNA sequences attached to fluorescent dyes to target specific chromosomal regions.

Explain why geneticists believe that almost all chromosomally abnormal embryos and fetuses are eliminated as pregnancy progresses.

Trisomy 21 is the only autosomal trisomy that allows survival into adulthood.

Viral infections are not considered a risk factor for autosomal trisomy because a virus cannot affect human chromosome arrangement.

One important difference between amniocentesis and chorionic villus sampling is that ____.

A Perspective on Human Genetics

Cells and Cell Division

Transmission of Genes from Generation to Generation

Pedigree Analysis in Human Genetics

The Inheritance of Complex Traits

Development and Sex Determination

The Structure - Replication - and Chromosomal Organization of DNA

Gene Expression and Gene Regulation

From Proteins to Phenotypes

Genome Alterations - Mutation and Epigenetics

Genes and Cancer

An Introduction to Genetic Technology

Biotechnology and Society

Genomes and Genomics

Reproductive Technology - Genetic Testing - and Gene Therapy

Genes and The Immune System

Genetics of Behavior

Population Genetics and Human Evolution

Filters