Question 1

Enzymes associated with the synthesis of DNA and RNA are part of the chromatin.

Accepted Answer

A) True 
 B)False

Question 2

Sister chromatids become daughter chromosomes during:

Accepted Answer

A) prophase II. 
B) metaphase I. 
C) anaphase I. 
D) metaphase II. 
E) anaphase II. 
A) prophase II. 
B) metaphase I. 
C) anaphase I. 
D) metaphase II. 
E) anaphase II.

Question 3

Homologous pairs of chromosomes separate during:

Accepted Answer

A) prophase II. 
B) metaphase I. 
C) anaphase I. 
D) metaphase II. 
E) anaphase III. 
A) prophase II. 
B) metaphase I. 
C) anaphase I. 
D) metaphase II. 
E) anaphase III.

Question 4

Aneuploidy results from the duplication of whole sets of chromosomes.

Accepted Answer

A) True 
 B)False

Question 5

An aquatic plant produces one type of leaf above water and another type of leaf under water.This is most likely an example of:

Accepted Answer

A) one gene having multiple effects. 
B) interaction of the genotype with the environment. 
C) one allele not completely masking another allele. 
D) one gene masking the effect of another gene. 
E) several different genes interacting. 
A) one gene having multiple effects. 
B) interaction of the genotype with the environment. 
C) one allele not completely masking another allele. 
D) one gene masking the effect of another gene. 
E) several different genes interacting.

Question 6

Unpaired double-stranded chromosomes line up on the equatorial plane during:

Accepted Answer

A) prophase II. 
B) metaphase I. 
C) anaphase I. 
D) metaphase II. 
E) anaphase II. 
A) prophase II. 
B) metaphase I. 
C) anaphase I. 
D) metaphase II. 
E) anaphase II.

Question 7

If W represents the allele for purple flower color, and w represents the allele for white flower color, what phenotypic ratio would you expect for the offspring of a testcross?

Accepted Answer

A) One WW: one ww 
B) One WW: two Ww: one ww 
C) Three WW: one ww 
D) One WW: three ww 
E) Three WW: two Ww: one ww 
A) One WW: one ww 
B) One WW: two Ww: one ww 
C) Three WW: one ww 
D) One WW: three ww 
E) Three WW: two Ww: one ww

Question 8

In peas, tall stem length is dominant over short length.What genotypic ratio would you expect in the offspring of a cross between a heterozygous tall plant and a homozygous short plant?

Accepted Answer

A) three homozygous tall: one homozygous short 
B) one homozygous tall: one homozygous short 
C) one heterozygous tall: one homozygous short 
D) three heterozygous tall: one homozygous short 
E) one homozygous tall: two heterozygous tall: one homozygous short 
A) three homozygous tall: one homozygous short 
B) one homozygous tall: one homozygous short 
C) one heterozygous tall: one homozygous short 
D) three heterozygous tall: one homozygous short 
E) one homozygous tall: two heterozygous tall: one homozygous short

Question 9

Sister chromatids separate during anaphase I.

Accepted Answer

A) True 
 B)False

Question 10

The greater the distance between two genes on a chromosome, the smaller is the chance that they will undergo crossing-over during meiosis.

Accepted Answer

A) True 
 B)False

Question 11

Crossing-over is the exchange of genetic material between the sister chromatids of a chromosome.

Accepted Answer

A) True 
 B)False

Question 12

It is likely that one of the four daughter cells resulting from meiosis will be genetically identical to one of the gametes that fused to produce the diploid line of cells undergoing meiosis.

Accepted Answer

A) True 
 B)False

Question 13

In snapdragons, a cross between a red-flowered plant and a white-flowered plant produces a plant with pink flowers.What offspring would you expect from a cross between two pink-flowered plants?

Accepted Answer

A) All pink 
B) 1/2 pink and 1/2 white 
C) 1/2 pink and 1/2 red 
D) 1/4 red, 1/2 pink, 1/4 white 
E) 1/4 pink, 1/2 red, 1/4 white 
A) All pink 
B) 1/2 pink and 1/2 white 
C) 1/2 pink and 1/2 red 
D) 1/4 red, 1/2 pink, 1/4 white 
E) 1/4 pink, 1/2 red, 1/4 white

Question 14

By crossing different varieties of peas ______ discovered the principles of heredity.

Accepted Answer

A) William Bateson 
B) Walter Sutton 
C) Gregor Mendel 
D) Hugo de Vries 
E) Barbara McClintock 
A) William Bateson 
B) Walter Sutton 
C) Gregor Mendel 
D) Hugo de Vries 
E) Barbara McClintock

Question 15

When a particular trait appears in the F2 generation but not in the F1 generation, it is an indication that:

Accepted Answer

A) a monohybrid cross is involved. 
B) a dihybrid cross is involved. 
C) true-breeding plants are involved. 
D) the trait is recessive. 
E) the trait is dominant. 
A) a monohybrid cross is involved. 
B) a dihybrid cross is involved. 
C) true-breeding plants are involved. 
D) the trait is recessive. 
E) the trait is dominant.

Question 16

A nucleosome consists of:

Accepted Answer

A) nonhistone chromosomal proteins. 
B) eight histone molecules arranged in a spherical mass. 
C) a strand of DNA that is not associated with histones. 
D) a looped domain in the chromosome. 
E) a core of histones wrapped with DNA. 
A) nonhistone chromosomal proteins. 
B) eight histone molecules arranged in a spherical mass. 
C) a strand of DNA that is not associated with histones. 
D) a looped domain in the chromosome. 
E) a core of histones wrapped with DNA.

Question 17

Crossing-over occurs during:

Accepted Answer

A) prophase II. 
B) metaphase I. 
C) telophase I. 
D) metaphase II. 
E) prophase I. 
A) prophase II. 
B) metaphase I. 
C) telophase I. 
D) metaphase II. 
E) prophase I.

Question 18

If two genes are linked, then they are on the same chromosome.

Accepted Answer

A) True 
 B)False

Question 19

A mutation in a haploid cell is more likely to have an effect on phenotype than a mutation in a diploid cell.

Accepted Answer

A) True 
 B)False

Question 20

The notation pp indicates that a plant is homozygous dominant for that trait.

Accepted Answer

A) True 
 B)False

Exam 8: Sexual Reproduction and Heredity

Enzymes associated with the synthesis of DNA and RNA are part of the chromatin.

Sister chromatids become daughter chromosomes during:

Homologous pairs of chromosomes separate during:

Aneuploidy results from the duplication of whole sets of chromosomes.

An aquatic plant produces one type of leaf above water and another type of leaf under water.This is most likely an example of:

Unpaired double-stranded chromosomes line up on the equatorial plane during:

If W represents the allele for purple flower color, and w represents the allele for white flower color, what phenotypic ratio would you expect for the offspring of a testcross?

In peas, tall stem length is dominant over short length.What genotypic ratio would you expect in the offspring of a cross between a heterozygous tall plant and a homozygous short plant?

Sister chromatids separate during anaphase I.

The greater the distance between two genes on a chromosome, the smaller is the chance that they will undergo crossing-over during meiosis.

Crossing-over is the exchange of genetic material between the sister chromatids of a chromosome.

It is likely that one of the four daughter cells resulting from meiosis will be genetically identical to one of the gametes that fused to produce the diploid line of cells undergoing meiosis.

In snapdragons, a cross between a red-flowered plant and a white-flowered plant produces a plant with pink flowers.What offspring would you expect from a cross between two pink-flowered plants?

By crossing different varieties of peas ______ discovered the principles of heredity.

When a particular trait appears in the F2 generation but not in the F1 generation, it is an indication that:

A nucleosome consists of:

Crossing-over occurs during:

If two genes are linked, then they are on the same chromosome.

A mutation in a haploid cell is more likely to have an effect on phenotype than a mutation in a diploid cell.

The notation pp indicates that a plant is homozygous dominant for that trait.

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

Filters

When a particular trait appears in the F₂ generation but not in the F₁ generation, it is an indication that: