Question 1

At which stage of meiosis does crossing-over occur?

Accepted Answer

A) Prophase of the first meiotic division 
B) Anaphase of the first meiotic division 
C) Prophase of the second meiotic division 
D) Anaphase of the second meiotic division 
A) Prophase of the first meiotic division 
B) Anaphase of the first meiotic division 
C) Prophase of the second meiotic division 
D) Anaphase of the second meiotic division

Question 2

_________ _________ are enzymes derived from bacteria;they cleave double-stranded DNA at a particular site determined by the particular base sequences (recognition site)at that point.

Accepted Answer

Restrictio

Question 3

F2 offspring of a monohybrid cross involving Aa genotype show which genotype(s)?

Accepted Answer

A) Aa only 
B) AA and Aa 
C) Aa and aa 
D) AA,Aa,and aa 
A) Aa only 
B) AA and Aa 
C) Aa and aa 
D) AA,Aa,and aa

Question 4

If an egg of a worm contains 6 chromosomes following meiosis,it comes from a worm that has ______ chromosomes in each body cell.

Accepted Answer

A) 3 
B) 6 
C) 12 
D) 24 
A) 3 
B) 6 
C) 12 
D) 24

Question 5

Since a testcross backcrosses with a pure homozygous recessive strain,the offspring of an Aa genotype crossed by an aa genotype would show which genotype(s)?

Accepted Answer

A) aa only 
B) Aa only 
C) AA and Aa 
D) Aa and aa 
A) aa only 
B) Aa only 
C) AA and Aa 
D) Aa and aa

Question 6

Deletion of one chromosome,as in the case of XO or Turner syndrome,would be a case of

Accepted Answer

A) aneuploidy. 
B) changes in the linear arrangement of genes within one chromosome. 
C) trisomy. 
D) polyploidy. 
A) aneuploidy. 
B) changes in the linear arrangement of genes within one chromosome. 
C) trisomy. 
D) polyploidy.

Question 7

Messenger RNA is transcribed using which strand of DNA?

Accepted Answer

A) Sense strand 
B) Antisense strand 
C) Messenger RNA is not transcribed from DNA 
D) Both strands of DNA are typically used 
A) Sense strand 
B) Antisense strand 
C) Messenger RNA is not transcribed from DNA 
D) Both strands of DNA are typically used

Question 8

Which of the following processes synthesizes mRNA,tRNA,or rRNA?

Accepted Answer

A) Translation 
B) Transcription 
C) Transposition 
D) None of the choices is correct 
A) Translation 
B) Transcription 
C) Transposition 
D) None of the choices is correct

Question 9

A trait caused by genes at several loci is an example of which of these?

Accepted Answer

A) Multiple alleles at one locus 
B) Epistasis 
C) Pleiotropy 
D) Polygenic inheritance 
A) Multiple alleles at one locus 
B) Epistasis 
C) Pleiotropy 
D) Polygenic inheritance

Question 10

What is a synaptonemal complex?

Accepted Answer

A) The internal structure of nucleoprotein that makes up a chromosome 
B) A proteinaceous structure that holds together two sister chromatids 
C) The spindle fibers that attach from pole to pole without binding chromosomes 
D) The set of cells produced from a single original parent cell in oogenesis 
A) The internal structure of nucleoprotein that makes up a chromosome 
B) A proteinaceous structure that holds together two sister chromatids 
C) The spindle fibers that attach from pole to pole without binding chromosomes 
D) The set of cells produced from a single original parent cell in oogenesis

Question 11

Why is crossing-over important?

Accepted Answer

A) Crossing-over provides extra genetic material for the daughter cells. 
B) Crossing-over increases the likelihood that daughter cells contain recombined genetic material. 
C) Crossing-over increases chromosome condensation. 
D) Crossing-over separates the homologous chromosomes. 
A) Crossing-over provides extra genetic material for the daughter cells. 
B) Crossing-over increases the likelihood that daughter cells contain recombined genetic material. 
C) Crossing-over increases chromosome condensation. 
D) Crossing-over separates the homologous chromosomes.

Question 12

The most familiar form of aneuploidy in humans results in Down Syndrome or ________ _________.

Accepted Answer

The answer of The most familiar form of aneuploidy in...

Question 13

Which type of molecule produces variable lengths of DNA with "sticky ends"?

Accepted Answer

A) DNA ligase 
B) RNA polymerase 
C) Reverse transcriptase 
D) Restriction enzyme 
A) DNA ligase 
B) RNA polymerase 
C) Reverse transcriptase 
D) Restriction enzyme

Exam 5: Genetics: a Review

At which stage of meiosis does crossing-over occur?

_________ _________ are enzymes derived from bacteria;they cleave double-stranded DNA at a particular site determined by the particular base sequences (recognition site)at that point.

F2 offspring of a monohybrid cross involving Aa genotype show which genotype(s)?

If an egg of a worm contains 6 chromosomes following meiosis,it comes from a worm that has ______ chromosomes in each body cell.

Since a testcross backcrosses with a pure homozygous recessive strain,the offspring of an Aa genotype crossed by an aa genotype would show which genotype(s)?

Deletion of one chromosome,as in the case of XO or Turner syndrome,would be a case of

Messenger RNA is transcribed using which strand of DNA?

Which of the following processes synthesizes mRNA,tRNA,or rRNA?

A trait caused by genes at several loci is an example of which of these?

What is a synaptonemal complex?

Why is crossing-over important?

The most familiar form of aneuploidy in humans results in Down Syndrome or ________ _________.

Which type of molecule produces variable lengths of DNA with "sticky ends"?

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cells As Units of Life

Cellular Metabolism

Organic Evolution

The Reproductive Process

Principles of Development

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

Chaetognaths, echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, Protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distribution

Animal Ecology

Filters

_ _ are enzymes derived from bacteria;they cleave double-stranded DNA at a particular site determined by the particular base sequences (recognition site)at that point.

F₂ offspring of a monohybrid cross involving Aa genotype show which genotype(s)?

The most familiar form of aneuploidy in humans results in Down Syndrome or _.