Question 1

rDNA in eukaryotes is typically redundant.

Accepted Answer

A) True 
 B)False

Question 2

A pericentric inversion includes the centromere.

Accepted Answer

A) True 
 B)False

Question 3

Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one (extra) chromosome 21. Although fertility is reduced in both sexes,
Females have higher fertility than males. Van Dyke et al. (1995; Down Syndrome Research and
Practice 3[2]:65-69) summarize data involving children born of Down syndrome individuals. Given the fact that conceptuses with 48 chromosomes (four chromosome 21's) are not likely to survive early development, what percentage of surviving offspring would be expected to have Down syndrome if both parents have Down syndrome?

Accepted Answer

A)  None of the surviving offspring would be expected to have Down syndrome. 
B)  All the children would be expected to have Down syndrome. 
C)  One -half of the surviving offspring would be expected to have Down syndrome. 
D)  One -third of the surviving offspring would be expected to have Down syndrome. 
E)  Two -thirds of the surviving offspring would be expected to have Down syndrome. 
A)  None of the surviving offspring would be expected to have Down syndrome. 
B)  All the children would be expected to have Down syndrome. 
C)  One -half of the surviving offspring would be expected to have Down syndrome. 
D)  One -third of the surviving offspring would be expected to have Down syndrome. 
E)  Two -thirds of the surviving offspring would be expected to have Down syndrome.

Question 4

An individual with Patau syndrome would be called a triploid.

Accepted Answer

A) True 
 B)False

Question 5

Assume that a species has a diploid chromosome number of 24. The term applied to an individual with 36 chromosomes would be triploid.

Accepted Answer

A) True 
 B)False

Question 6

True or False: An autotriploid may arise when three sperm cells are involved in fertilization of a single egg.

Accepted Answer

A) True 
 B)False

Question 7

Chorionic villus sampling (CVS) is sometimes preferred to amniocentesis because results can be provided earlier in the pregnancy.

Accepted Answer

A) True 
 B)False

rDNA in eukaryotes is typically redundant.

A pericentric inversion includes the centromere.

An individual with Patau syndrome would be called a triploid.

Assume that a species has a diploid chromosome number of 24. The term applied to an individual with 36 chromosomes would be triploid.

True or False: An autotriploid may arise when three sperm cells are involved in fertilization of a single egg.

Chorionic villus sampling (CVS) is sometimes preferred to amniocentesis because results can be provided earlier in the pregnancy.

Introduction to Genetics

Mitosis and Meiosis

Mendelian Genetics

Modifications of Mendelian Ratios

Sex Determination and Sex Chromosomes

Linkage and Chromosome Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bactierophages

DNA Structure and Analysis

DNA Replication and Recombination

Chromosome Structure and Dna Sequence Organization

The Genetic Code and Transcription

Translation and Proteins

Gene Mutation, Dna Repair, and Transposition

Regulation of Gene Expression

The Genetics of Cancer

Recombinant Dna Technology

Genomics and Proteomics

Applications and Ethics of Genetic Engineering and Biotechnology

Developmental Genetics

Quantitative Genetics and Multifactorial Traits

Population and Evolutionary Genetics

Filters

Exam 6: Chromosome Mutations: Variation in Number and Arrangement

rDNA in eukaryotes is typically redundant.

A pericentric inversion includes the centromere.

An individual with Patau syndrome would be called a triploid.

Assume that a species has a diploid chromosome number of 24. The term applied to an individual with 36 chromosomes would be triploid.

True or False: An autotriploid may arise when three sperm cells are involved in fertilization of a single egg.

Chorionic villus sampling (CVS) is sometimes preferred to amniocentesis because results can be provided earlier in the pregnancy.

Introduction to Genetics

Mitosis and Meiosis

Mendelian Genetics

Modifications of Mendelian Ratios

Sex Determination and Sex Chromosomes

Linkage and Chromosome Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bactierophages

DNA Structure and Analysis

DNA Replication and Recombination

Chromosome Structure and Dna Sequence Organization

The Genetic Code and Transcription

Translation and Proteins

Gene Mutation, Dna Repair, and Transposition

Regulation of Gene Expression

The Genetics of Cancer

Recombinant Dna Technology

Genomics and Proteomics

Applications and Ethics of Genetic Engineering and Biotechnology

Developmental Genetics

Quantitative Genetics and Multifactorial Traits

Population and Evolutionary Genetics

Filters