Question 1

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

Accepted Answer

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

Question 2

Which of the following would occur if there was no chiasma formation in prophase I?

Accepted Answer

A) Mosaic chromosomes would form. 
B) In a heterozygote,there would only be a 1:1:1:1 formation after meiosis II,never a 2:2. 
C) All gametes would have the same genotype. 
D) In a heterozygote,there would only be a 2:2 formation after meiosis II,never a 1:1:1:1. 
E) All gametes would have the same phenotype. 
A) Mosaic chromosomes would form. 
B) In a heterozygote,there would only be a 1:1:1:1 formation after meiosis II,never a 2:2. 
C) All gametes would have the same genotype. 
D) In a heterozygote,there would only be a 2:2 formation after meiosis II,never a 1:1:1:1. 
E) All gametes would have the same phenotype. D

Question 3

Electron microscopy of metaphase chromosomes demonstrated various degrees of coiling.What was the name of the model that depicted this process?

Accepted Answer

A) chromatid folding 
B) folded- fiber 
C) condensation 
D) double- stranded 
E) packing 
A) chromatid folding 
B) folded- fiber 
C) condensation 
D) double- stranded 
E) packing B

Question 4

Which if the following is true?

Accepted Answer

A) Cells are 4n after S phase. 
B) Cells are considered to be 2n after meiosis I. 
C) A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle. 
D) Sister chromatids in mitosis are not identical. 
E) A chromosome always contains the same number of chromatids,regardless of phase of the mitotic or meiotic cell cycle. 
A) Cells are 4n after S phase. 
B) Cells are considered to be 2n after meiosis I. 
C) A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle. 
D) Sister chromatids in mitosis are not identical. 
E) A chromosome always contains the same number of chromatids,regardless of phase of the mitotic or meiotic cell cycle.

Question 5

Which part of interphase does DNA duplication take place?

Accepted Answer

A) G0 
B) M 
C) G2 
D) S 
E) G1 
A) G0 
B) M 
C) G2 
D) S 
E) G1

Question 6

The ant,Myrmecia pilosula,is found in Australia and is named bulldog because of its aggressive behavior.It is particularly interesting because it carries all its genetic information in a single pair of chromosomes.In other words,2n = 2.Males are haploid and have just one chromosome.)Which of the following figures would most likely represent a correct configuration of chromosomes in a metaphase I cell of a female?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 7

A G1 somatic cell nucleus in a female diploid Myrmecia pilosula bulldog ant)contains 2 picograms of DNA.How much DNA would be expected in a metaphase I cell of a female?

Accepted Answer

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

Question 8

Which chromosome has a telomere but the p arm is much shorter than the q arm?

Accepted Answer

A) submetacentric 
B) telocentric 
C) metacentric 
D) acrocentric 
E) sex chromosome 
A) submetacentric 
B) telocentric 
C) metacentric 
D) acrocentric 
E) sex chromosome

Question 9

In which stage of the cell cycle is G0 located?

Accepted Answer

A) G1 
B) S 
C) M 
D) anaphase 
E) G2 
A) G1 
B) S 
C) M 
D) anaphase 
E) G2

Question 10

The diploid chromosome number of an organism is usually represented as 2n.Humans have a diploid chromosome number of 46.What would be the expected haploid chromosome number in a human?

Accepted Answer

A) 92 
B) 16 
C) 23 
D) 12 
E) 24 
A) 92 
B) 16 
C) 23 
D) 12 
E) 24

Question 11

Drosophila melanogaster,the fruit fly,has a 2n chromosome number of 8.Assuming that a somatic G2 nucleus from one of the individuals in this scenario contains about 8.0 picograms of DNA,how much nuclear DNA would you expect in a fly egg?

Accepted Answer

A) 16 pg 
B) 4 pg 
C) 8 pg 
D) 2 pg 
E) 1 pg 
A) 16 pg 
B) 4 pg 
C) 8 pg 
D) 2 pg 
E) 1 pg

Question 12

A typical G1 nucleus is 2n and contains 2C two complements)of DNA.Which of the following is true?

Accepted Answer

A) A cell in prophase is 2n and contains 4C of DNA. 
B) A cell in G2 is 4n and contains 2C of DNA. 
C) A cell in prophase is 2n and contains 2n of DNA. 
D) A cell in metaphase is 2n and contains 2C of DNA. 
E) A prophase cell is 4n and contains 4C of DNA. 
A) A cell in prophase is 2n and contains 4C of DNA. 
B) A cell in G2 is 4n and contains 2C of DNA. 
C) A cell in prophase is 2n and contains 2n of DNA. 
D) A cell in metaphase is 2n and contains 2C of DNA. 
E) A prophase cell is 4n and contains 4C of DNA.

Question 13

The house fly,Musca domestica,has a haploid chromosome number of 6.How many chromatids should be present in a diploid,somatic,metaphase cell?

Accepted Answer

A) 24 
B) 3 
C) 6 
D) 12 
E) 18 
A) 24 
B) 3 
C) 6 
D) 12 
E) 18

Question 14

In plants,which stage is haploid?

Accepted Answer

A) germ cell 
B) spermatozoa 
C) sporophyte 
D) gametophyte 
E) polar body 
A) germ cell 
B) spermatozoa 
C) sporophyte 
D) gametophyte 
E) polar body

Question 15

The horse Equus caballus)has 32 pairs of chromosomes,whereas the donkey Equus asinus has 31 pairs of chromosomes.How many chromosomes would be expected in the somatic tissue of a mule,which is a hybrid of these two animals?

Accepted Answer

A) 62 
B) 64 
C) 60 
D) 63 
E) 126 
A) 62 
B) 64 
C) 60 
D) 63 
E) 126

Question 16

In an organism with 60 chromosomes,how many bivalents would be expected to form during meiosis?

Accepted Answer

A) 30 
B) 15 
C) 60 
D) 120 
E) 240 
A) 30 
B) 15 
C) 60 
D) 120 
E) 240

Question 17

After meiosis II,________would be formed.

Accepted Answer

A) dyads 
B) synapsis 
C) chiasma 
D) tetrads 
E) monads 
A) dyads 
B) synapsis 
C) chiasma 
D) tetrads 
E) monads

Question 18

Given that each G1 nucleus from this organism contains 16 picograms of DNA,how many picograms of chromosomal DNA would you expect in the cell shown below?

Accepted Answer

A) 2 
B) 16 
C) 4 
D) 32 
E) 8 
A) 2 
B) 16 
C) 4 
D) 32 
E) 8

Question 19

When cells withdraw from the continuous cell cycle and enter a "quiescent" phase,they are said to be in what stage?

Accepted Answer

A) G1 
B) G2 
C) M 
D) S 
E) G0 
A) G1 
B) G2 
C) M 
D) S 
E) G0

Question 20

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

Accepted Answer

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

Exam 2: Mitosis and Meiosis

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

Which of the following would occur if there was no chiasma formation in prophase I?

Electron microscopy of metaphase chromosomes demonstrated various degrees of coiling.What was the name of the model that depicted this process?

Which if the following is true?

Which part of interphase does DNA duplication take place?

A G1 somatic cell nucleus in a female diploid Myrmecia pilosula bulldog ant)contains 2 picograms of DNA.How much DNA would be expected in a metaphase I cell of a female?

Which chromosome has a telomere but the p arm is much shorter than the q arm?

In which stage of the cell cycle is G0 located?

The diploid chromosome number of an organism is usually represented as 2n.Humans have a diploid chromosome number of 46.What would be the expected haploid chromosome number in a human?

Drosophila melanogaster,the fruit fly,has a 2n chromosome number of 8.Assuming that a somatic G2 nucleus from one of the individuals in this scenario contains about 8.0 picograms of DNA,how much nuclear DNA would you expect in a fly egg?

A typical G1 nucleus is 2n and contains 2C two complements)of DNA.Which of the following is true?

The house fly,Musca domestica,has a haploid chromosome number of 6.How many chromatids should be present in a diploid,somatic,metaphase cell?

In plants,which stage is haploid?

The horse Equus caballus)has 32 pairs of chromosomes,whereas the donkey Equus asinus has 31 pairs of chromosomes.How many chromosomes would be expected in the somatic tissue of a mule,which is a hybrid of these two animals?

In an organism with 60 chromosomes,how many bivalents would be expected to form during meiosis?

After meiosis II,________would be formed.

Given that each G1 nucleus from this organism contains 16 picograms of DNA,how many picograms of chromosomal DNA would you expect in the cell shown below?

When cells withdraw from the continuous cell cycle and enter a "quiescent" phase,they are said to be in what stage?

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

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 Bacteria

Transcriptional Regulation in Eukaryotes

Post-Transcriptional Regulation in Eukaryotes

Epigenetic Regulation in Eukaryotes

Recombinant Dna Technology

Genomic Analysis

Applications of Genetic Engineering and Biotechnology

Developmental Genetics

Cancer Genetics

Quantitative Genetics and Multifactorial Traits

Population and Evolutionary Genetics

CRISPR and Genomic Editing

DNA Forensics

Genomics and Precision Medicine

Genetically Modified Foods

Gene Therapy

Advances in Neurogenetics: The Study of Huntington Disease

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