Question 1

Regarding the mitotic cell cycle,what is meant by a checkpoint?

Accepted Answer

A checkpoint is the portion of a cell cy

Question 2

Assume that an organism has a diploid chromosome number of six.Two chromosomal pairs are telocentric,and the other pair is metacentric.Assume that the sex chromosomes are morphologically identical.Draw chromosomes as you would expect them to appear at the following stages:
Primary oocyte (metaphase)
Secondary spermatocyte (metaphase)
First polar body (metaphase)

Accepted Answer

The answer of Assume that an organism has a diploid...

Question 3

Living organisms are categorized into two major groups based on the presence or absence of a nucleus.What group is defined by the presence of a nucleus?

Accepted Answer

A)  eukaryotic organism 
B)  virus 
C)  bacterium 
D)  prokaryotic organism 
E)  mitochondrial organism 
A)  eukaryotic organism 
B)  virus 
C)  bacterium 
D)  prokaryotic organism 
E)  mitochondrial organism

Question 4

The nucleolus organizer (NOR)is responsible for production of what type of cell structure?

Accepted Answer

The answer of The nucleolus organizer (NOR)is responsible for production...

Question 5

After which meiotic stage (meiosis I or II)would one expect monads to be formed?

Accepted Answer

The answer of After which meiotic stage (meiosis I or...

Question 6

You may have heard through various media of an animal alleged to be the hybrid of a rabbit and a cat.Given that the cat (Felis domesticus)has a diploid chromosome number of 38 and a rabbit (Oryctolagus cuniculus)has a diploid chromosome number of 44,what would be the expected chromosome number in the somatic tissues of this alleged hybrid?

Accepted Answer

The answer of You may have heard through various media...

Question 7

In a healthy female,how many secondary oocytes would be expected to form from 100 primary oocytes? How many first polar bodies would be expected from 100 primary oocytes?

Accepted Answer

A)  200; 50 
B)  100; 50 
C)  200; 300 
D)  100; 100 
E)  50; 50 
A)  200; 50 
B)  100; 50 
C)  200; 300 
D)  100; 100 
E)  50; 50

Question 8

What significant genetic function occurs in the S phase of the cell cycle?

Accepted Answer

A)  cytokinesis 
B)  karyokinesis 
C)  DNA synthesis 
D)  chromosome condensation 
E)  centromere division 
A)  cytokinesis 
B)  karyokinesis 
C)  DNA synthesis 
D)  chromosome condensation 
E)  centromere division

Question 9

The meiotic cell cycle involves two cell divisions but only one DNA replication.

Accepted Answer

A) True 
 B)False

Question 10

A bivalent at pachytene contains four chromatids.

Accepted Answer

A) True 
 B)False

Question 11

An organism with a diploid chromosome number of 46 will produce 223 combinations of chromosomes at the end of meiosis.

Accepted Answer

A) True 
 B)False

Question 12

S phase is the part of interphase when DNA duplication takes place.

Accepted Answer

A) True 
 B)False

Question 13

Two terms,reductional and equational,generally refer to which stages of meiosis (I or II)?

Accepted Answer

meiosis I

Question 14

Trisomy 21,or Down syndrome,occurs when there is a normal diploid chromosomal complement of 46 chromosomes plus one (extra)chromosome #21.Such individuals therefore have 47 chromosomes.Assume that a mating occurs between a female with Down syndrome and a normal 46-chromosome male.What proportion of the offspring would be expected to have Down syndrome? Justify your answer.

Accepted Answer

One-half of the offspring woul

Question 15

List,in order of appearance,all the cell types expected to be formed during (a)spermatogenesis and (b)oogenesis.

Accepted Answer

(a)spermatogonia,primary sperm

Question 16

What is the name of the membranous structure that compartmentalizes the cytoplasm of eukaryotic organisms?

Accepted Answer

A)  ribosome 
B)  mitochondria 
C)  cytosol 
D)  endoplasmic reticulum 
E)  nucleoid 
A)  ribosome 
B)  mitochondria 
C)  cytosol 
D)  endoplasmic reticulum 
E)  nucleoid

Question 17

During meiosis,chromosome number reduction takes place in anaphase II.

Accepted Answer

A) True 
 B)False

Question 18

For the purposes of this question,assume that a G1 somatic cell nucleus in a female Myrmecia pilosula contains 2 picograms of DNA.How much DNA would be expected in a metaphase I cell of a female?

Accepted Answer

A)  16 picograms 
B)  32 picograms 
C)  8 picograms 
D)  4 picograms 
E)  Not enough information is provided to answer the question. 
A)  16 picograms 
B)  32 picograms 
C)  8 picograms 
D)  4 picograms 
E)  Not enough information is provided to answer the question.

Question 19

If a typical somatic cell has 64 chromosomes,how many chromosomes are expected in each gamete of that organism?

Accepted Answer

A)  8 
B)  16 
C)  32 
D)  64 
E)  128 
A)  8 
B)  16 
C)  32 
D)  64 
E)  128

Question 20

In an organism with 52 chromosomes,how many bivalents would be expected to form during meiosis?

Accepted Answer

A)  13 
B)  26 
C)  52 
D)  104 
E)  208 
A)  13 
B)  26 
C)  52 
D)  104 
E)  208

Exam 2: Mitosis and Meiosis

Regarding the mitotic cell cycle,what is meant by a checkpoint?

Living organisms are categorized into two major groups based on the presence or absence of a nucleus.What group is defined by the presence of a nucleus?

The nucleolus organizer (NOR)is responsible for production of what type of cell structure?

After which meiotic stage (meiosis I or II)would one expect monads to be formed?

In a healthy female,how many secondary oocytes would be expected to form from 100 primary oocytes? How many first polar bodies would be expected from 100 primary oocytes?

What significant genetic function occurs in the S phase of the cell cycle?

The meiotic cell cycle involves two cell divisions but only one DNA replication.

A bivalent at pachytene contains four chromatids.

An organism with a diploid chromosome number of 46 will produce 223 combinations of chromosomes at the end of meiosis.

S phase is the part of interphase when DNA duplication takes place.

Two terms,reductional and equational,generally refer to which stages of meiosis (I or II)?

List,in order of appearance,all the cell types expected to be formed during (a)spermatogenesis and (b)oogenesis.

What is the name of the membranous structure that compartmentalizes the cytoplasm of eukaryotic organisms?

During meiosis,chromosome number reduction takes place in anaphase II.

For the purposes of this question,assume that a G1 somatic cell nucleus in a female Myrmecia pilosula contains 2 picograms of DNA.How much DNA would be expected in a metaphase I cell of a female?

If a typical somatic cell has 64 chromosomes,how many chromosomes are expected in each gamete of that organism?

In an organism with 52 chromosomes,how many bivalents would be expected to form during meiosis?

Introduction to Genetics

Mendelian Genetics

Extensions of Mendelian Genetics

Chromosome Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bacteriophages

Sex Determination and Sex Chromosomes

Chromosome Mutations: Variation in Number and Arrangement

Extranuclear Inheritance

DNA Structure and Analysis

DNA Replication and Recombination

DNA Organization in Chromosomes

The Genetic Code and Transcription

Translation and Proteins

Gene Mutation,dna Repair,and Transposition

Regulation of Gene Expression in Prokaryotes

Regulation of Gene Expression in Eukaryotes

Developmental Genetics

Cancer and Regulation of the Cell Cycle

Recombinant DNA Technology

Genomics, bioinformatics, and Proteomics

Applications and Ethics of Genetic Engineering and Biotechnology

Quantitative Genetics and Multifactorial Traits

Neurogenetics

Population and Evolutionary Genetics

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