Question 1

Visible or measurable characteristics of an organism,resulting from its genotype,are called its ________.

Accepted Answer

The answer of Visible or measurable characteristics of an organism,resulting...

Question 2

Variations in a gene are called allelic variations.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following generally has the least effect on the phenotype of the individual who carries it?

Accepted Answer

A)  Robertsonian translocation 
B)  unbalanced translocation 
C)  balanced translocation 
D)  All of these choices are equally detrimental to the phenotype. 
A)  Robertsonian translocation 
B)  unbalanced translocation 
C)  balanced translocation 
D)  All of these choices are equally detrimental to the phenotype.

Question 4

What are Klinefelter and Turner syndromes examples of?

Accepted Answer

A)  sex chromosome aneuploidy 
B)  autosomal aneuploidy 
C)  reciprocal translocations 
D)  paracentric inversions 
A)  sex chromosome aneuploidy 
B)  autosomal aneuploidy 
C)  reciprocal translocations 
D)  paracentric inversions

Question 5

A ________ translocation occurs when a piece of one chromosome is attached to another chromosome.

Accepted Answer

A)  simple 
B)  complex 
C)  reciprocal 
D)  balanced 
A)  simple 
B)  complex 
C)  reciprocal 
D)  balanced

Question 6

Polytene chromosomes are

Accepted Answer

A)  chromosomes that lack telomeres. 
B)  chromosomes with high copy number variation. 
C)  backup copies of chromosomes that are kept segregated away from the functional copies. 
D)  bundles of hundreds of copies of the same chromosome. 
A)  chromosomes that lack telomeres. 
B)  chromosomes with high copy number variation. 
C)  backup copies of chromosomes that are kept segregated away from the functional copies. 
D)  bundles of hundreds of copies of the same chromosome.

Question 7

Robertsonian translocations usually occur between what types of chromosomes?

Accepted Answer

A)  metacentric 
B)  acrocentric 
C)  telocentric 
D)  submetacentric 
A)  metacentric 
B)  acrocentric 
C)  telocentric 
D)  submetacentric

Question 8

The majority of autosomal aneuploid conditions are lethal,but sex chromosome aneuploids are usually not lethal.

Accepted Answer

A) True 
 B)False

Question 9

The term ________ refers to genetic differences between members of the same species.

Accepted Answer

A)  chromosomal variation 
B)  genetic variation 
C)  chromosomal deletions 
D)  polyploidy 
A)  chromosomal variation 
B)  genetic variation 
C)  chromosomal deletions 
D)  polyploidy

Question 10

A translocation cross may occur in an individual which has which of the following?

Accepted Answer

A)  reciprocal translocation 
B)  unbalanced translocation 
C)  simple translocations 
D)  All of these choices are correct. 
A)  reciprocal translocation 
B)  unbalanced translocation 
C)  simple translocations 
D)  All of these choices are correct.

Question 11

Variations in chromosome structure are important for which of the following reason(s)?

Accepted Answer

A)  evolution of new species 
B)  may result in the production of abnormal offspring 
C)  may alter the phenotype of an organism 
D)  All of these choices are correct. 
A)  evolution of new species 
B)  may result in the production of abnormal offspring 
C)  may alter the phenotype of an organism 
D)  All of these choices are correct.

Question 12

Chromosomes may be identified based on which of the following characteristics?

Accepted Answer

A)  location of the centromere 
B)  banding patterns 
C)  size of the chromosome 
D)  All of these choices are correct. 
A)  location of the centromere 
B)  banding patterns 
C)  size of the chromosome 
D)  All of these choices are correct.

Question 13

_______ is a drug that is used to experimentally produce polyploidy in organisms.

Accepted Answer

A)  Penicillin 
B)  Colchicine 
C)  Polymosca 
D)  Karyocine 
A)  Penicillin 
B)  Colchicine 
C)  Polymosca 
D)  Karyocine

Question 14

Since no genetic material is lost or gained by an inversion,it will only influence phenotype if the breaks are within a gene or in important regulatory regions for a gene.

Accepted Answer

A) True 
 B)False

Question 15

Polyploid plants tend to produce less fruits and flowers,be smaller in size,and cannot adapt as well to extreme environmental conditions as normal varieties.

Accepted Answer

A) True 
 B)False

Question 16

The polytene chromosomes of Drosophila are an example of ________.

Accepted Answer

A)  aneuploidy 
B)  polyploidy 
C)  translocations 
D)  inversion loops 
E)  None of these choices are correct. 
A)  aneuploidy 
B)  polyploidy 
C)  translocations 
D)  inversion loops 
E)  None of these choices are correct.

Question 17

An inversion heterozygote contains which of the following?

Accepted Answer

A)  two homologous chromosomes with inversions 
B)  two normal chromosomes 
C)  one normal chromosome and one chromosome with an inversion 
D)  None of these choices are correct. 
A)  two homologous chromosomes with inversions 
B)  two normal chromosomes 
C)  one normal chromosome and one chromosome with an inversion 
D)  None of these choices are correct.

Question 18

The effects of a deficiency on an organism are dependent on the importance of the missing genetic material.

Accepted Answer

A) True 
 B)False

Question 19

The production of gene families,such as the globin genes,is the result of ________.

Accepted Answer

A)  inversions 
B)  deficiencies 
C)  gene duplications 
D)  simple translocations 
E)  None of these choices are correct. 
A)  inversions 
B)  deficiencies 
C)  gene duplications 
D)  simple translocations 
E)  None of these choices are correct.

Question 20

Given the following sequence of genes on a chromosome,determine what change in chromosome structure occurred.The asterisk (*)indicates the centromere.
Before: A B C D * E F G H
After:A C D * E F G H

Accepted Answer

A)  terminal deletion 
B)  interstitial deletion 
C)  inversion 
D)  gene duplication 
A)  terminal deletion 
B)  interstitial deletion 
C)  inversion 
D)  gene duplication

Exam 8: Variation in Chromosome Structure and Number

Visible or measurable characteristics of an organism,resulting from its genotype,are called its ________.

Variations in a gene are called allelic variations.

Which of the following generally has the least effect on the phenotype of the individual who carries it?

What are Klinefelter and Turner syndromes examples of?

A ________ translocation occurs when a piece of one chromosome is attached to another chromosome.

Polytene chromosomes are

Robertsonian translocations usually occur between what types of chromosomes?

The majority of autosomal aneuploid conditions are lethal,but sex chromosome aneuploids are usually not lethal.

The term ________ refers to genetic differences between members of the same species.

A translocation cross may occur in an individual which has which of the following?

Variations in chromosome structure are important for which of the following reason(s)?

Chromosomes may be identified based on which of the following characteristics?

_______ is a drug that is used to experimentally produce polyploidy in organisms.

Since no genetic material is lost or gained by an inversion,it will only influence phenotype if the breaks are within a gene or in important regulatory regions for a gene.

Polyploid plants tend to produce less fruits and flowers,be smaller in size,and cannot adapt as well to extreme environmental conditions as normal varieties.

The polytene chromosomes of Drosophila are an example of ________.

An inversion heterozygote contains which of the following?

The effects of a deficiency on an organism are dependent on the importance of the missing genetic material.

The production of gene families,such as the globin genes,is the result of ________.

Given the following sequence of genes on a chromosome,determine what change in chromosome structure occurred.The asterisk (*)indicates the centromere. Before: A B C D * E F G H After:A C D * E F G H

Overview of Genetics

Reproduction and Chromosome Transmission

Mendelian Inheritance

Sex Determination and Sex Chromosomes

Extensions of Mendelian Inheritance

Extranuclear Inheritance, Imprinting, and Maternal Effect

Genetic Linkage and Mapping in Eukaryotes

Genetics in Bacteria

Genetics of Viruses

Molecular Structure of DNA and RNA

Molecular Structure of Chromosomes and Transposition

Dna Replication and Recombination

Gene Transcription and RNA Modification

Translation of MRNA

Gene Regulation in Bacteria

Gene Regulation in Eukaryotes

Non-Coding Rnas

Gene Mutation and DNA Repair

Molecular Technologies

Genomics

Medical Genetics and Cancer

Population Genetics

Quantitative Genetics

Filters

Given the following sequence of genes on a chromosome,determine what change in chromosome structure occurred.The asterisk ()indicates the centromere. Before: A B C D E F G H After:A C D * E F G H