Question 1

Assume the same cross as in question 29.How many different kinds of genotypes would occur in the F2 generation?

Accepted Answer

A)  16 
B)  8 
C)  9 
D)  12 
E)  1 (i.e., all the genotypes are identical) 
A)  16 
B)  8 
C)  9 
D)  12 
E)  1 (i.e., all the genotypes are identical)

Question 2

When Mendel crossed tall pea plants with short ones, all of the offspring were intermediate in height.

Accepted Answer

A) True 
 B)False

Question 3

Since Mendel's time, types of inheritance that don't follow Mendel's rules have been discovered.Which of the following situations is NOT an exception to Mendel's rules?

Accepted Answer

A)  A phenotype in the offspring is intermediate between the two parental phenotypes. 
B)  Phenotypes of the offspring show range of phenotypes rather that two distinct phenotypes. 
C)  When doing a dihybrid cross between two heterozygous F1 offspring, the ratio obtained is statistically different from the Mendelian ratio. 
D)  When an individual with a heterozygous phenotype for a trait is crossed with an individual with a homozygous recessive phenotype, the ratio of phenotypes of the offspring is 1:1. 
E)  Two or more gene pairs are involved in producing the phenotypes of a given trait. 
A)  A phenotype in the offspring is intermediate between the two parental phenotypes. 
B)  Phenotypes of the offspring show range of phenotypes rather that two distinct phenotypes. 
C)  When doing a dihybrid cross between two heterozygous F1 offspring, the ratio obtained is statistically different from the Mendelian ratio. 
D)  When an individual with a heterozygous phenotype for a trait is crossed with an individual with a homozygous recessive phenotype, the ratio of phenotypes of the offspring is 1:1. 
E)  Two or more gene pairs are involved in producing the phenotypes of a given trait.

Question 4

In a variety of cornflowers in which blue flowers and dwarf plants are controlled by dominant genes carried on separate pairs of chromosomes, and white flowers and tall plants are their recessive counterparts, assume a cross has been made between a homozygous blue, dwarf plant and a homozygous white, tall plant.Which of the following would be represented in the F1 generation?

Accepted Answer

A)  BBDD 
B)  BBdd 
C)  bbDD 
D)  BbDd 
E)  BbDD 
A)  BBDD 
B)  BBdd 
C)  bbDD 
D)  BbDd 
E)  BbDD

Question 5

Messenger RNA is a small molecule composed of a few nucleotides.

Accepted Answer

A) True 
 B)False

Question 6

James Watson and Francis Crick started the field of _____________ with their 1953 discovery of the structure of DNA.

Accepted Answer

A)  Mendelian genetics 
B)  transposable genetics 
C)  population genetics 
D)  genetic inheritance 
E)  molecular genetics 
A)  Mendelian genetics 
B)  transposable genetics 
C)  population genetics 
D)  genetic inheritance 
E)  molecular genetics

Question 7

Which of the following increases the probability of genes being inherited together?

Accepted Answer

A)  Closeness to each other on a chromosome. 
B)  Length of the chromosome. 
C)  Size of the spindle during meiosis. 
D)  Low number of chromosomes. 
E)  High number of chromosomes. 
A)  Closeness to each other on a chromosome. 
B)  Length of the chromosome. 
C)  Size of the spindle during meiosis. 
D)  Low number of chromosomes. 
E)  High number of chromosomes.

Question 8

Changes in chromosome number and structure that ____________________ are important in the origin of new species (speciation).

Accepted Answer

A)  are point mutations 
B)  create new alleles 
C)  affect the success of meiosis and sexual reproduction 
D)  interfere with mitosis 
E)  alter the phenotype of the individual in a somatic mutation 
A)  are point mutations 
B)  create new alleles 
C)  affect the success of meiosis and sexual reproduction 
D)  interfere with mitosis 
E)  alter the phenotype of the individual in a somatic mutation

Question 9

A tRNA molecule can fit into a slot in a ribosomal subunit.

Accepted Answer

A) True 
 B)False

Question 10

_____________ and ______________ are molecular processes that convert genetic information into functional proteins.

Accepted Answer

A)  Replication; mutation 
B)  Meiosis; mitosis 
C)  Transcription; translation 
D)  Semiconservative; replication 
E)  All of the above 
A)  Replication; mutation 
B)  Meiosis; mitosis 
C)  Transcription; translation 
D)  Semiconservative; replication 
E)  All of the above

Question 11

A sequence of nucleotides in a chromosome that controls the production of a protein is a

Accepted Answer

A)  polysome. 
B)  gene. 
C)  intron. 
D)  chromatid. 
E)  operon. 
A)  polysome. 
B)  gene. 
C)  intron. 
D)  chromatid. 
E)  operon.

Question 12

Which is a part of DNA but not RNA?

Accepted Answer

A)  Uracil 
B)  Thymine 
C)  Adenine 
D)  Cytosine 
E)  Guanine 
A)  Uracil 
B)  Thymine 
C)  Adenine 
D)  Cytosine 
E)  Guanine

Question 13

Agents such as ultraviolet light and certain chemicals called ___________ can alter DNA sequences and permanently change the genome.

Accepted Answer

A)  mutagens 
B)  fertilization and sexual reproduction 
C)  chromosome addition or loss 
D)  mismatch of chromatids during crossing over 
E)  errors in replication 
A)  mutagens 
B)  fertilization and sexual reproduction 
C)  chromosome addition or loss 
D)  mismatch of chromatids during crossing over 
E)  errors in replication

Question 14

If red is dominant and yellow is recessive as a flower color in a certain species of plants, and if, in the same plants, long hairs are dominant and absence of hair is recessive, and a dihybrid cross involving homozygous parents is made, which of the following phenotypes would NOT appear in the F2 generation?

Accepted Answer

A)  Orange, hairy 
B)  Yellow, smooth 
C)  Red, hairy 
D)  Red, smooth 
E)  Yellow, hairy 
A)  Orange, hairy 
B)  Yellow, smooth 
C)  Red, hairy 
D)  Red, smooth 
E)  Yellow, hairy

Question 15

Assume the same cross as in question 29.Which of the following phenotypic ratios would be represented in the F2 generation?

Accepted Answer

A)  1:1:1:1 
B)  3:1 
C)  1:2:1:2:2:4:1:2:1 
D)  9:3:3:1 
E)  no ratio, because all the phenotypes are identical 
A)  1:1:1:1 
B)  3:1 
C)  1:2:1:2:2:4:1:2:1 
D)  9:3:3:1 
E)  no ratio, because all the phenotypes are identical

Question 16

Bateson and Punnett could not adequately explain unusual genetic ratios that occurred as a result of linkage.

Accepted Answer

A) True 
 B)False

Question 17

A recessive factor is one that cannot manifest itself in the phenotype.

Accepted Answer

A) True 
 B)False

Question 18

Lack of dominance means that only recessive genes are present.

Accepted Answer

A) True 
 B)False

Question 19

In a cross between a long and a globe-shaped radish, the F1 generation consisted of 247 oval-shaped radishes.The F2 generation consisted of 62 long radishes, 127 oval radishes, and 59 globe-shaped radishes.Which of the following pertaining to this cross is true?

Accepted Answer

A)  Long is dominant. 
B)  Oval is dominant. 
C)  Globe-shaped is dominant. 
D)  Oval is recessive. 
E)  None of the shapes is recessive. 
A)  Long is dominant. 
B)  Oval is dominant. 
C)  Globe-shaped is dominant. 
D)  Oval is recessive. 
E)  None of the shapes is recessive.

Question 20

The genetic information encoded in DNA is difficult to alter, making mutations rare.

Accepted Answer

A) True 
 B)False

Exam 13: Genetics

Assume the same cross as in question 29.How many different kinds of genotypes would occur in the F2 generation?

When Mendel crossed tall pea plants with short ones, all of the offspring were intermediate in height.

Since Mendel's time, types of inheritance that don't follow Mendel's rules have been discovered.Which of the following situations is NOT an exception to Mendel's rules?

Messenger RNA is a small molecule composed of a few nucleotides.

James Watson and Francis Crick started the field of _____________ with their 1953 discovery of the structure of DNA.

Which of the following increases the probability of genes being inherited together?

Changes in chromosome number and structure that ____________________ are important in the origin of new species (speciation).

A tRNA molecule can fit into a slot in a ribosomal subunit.

_____________ and ______________ are molecular processes that convert genetic information into functional proteins.

A sequence of nucleotides in a chromosome that controls the production of a protein is a

Which is a part of DNA but not RNA?

Agents such as ultraviolet light and certain chemicals called ___________ can alter DNA sequences and permanently change the genome.

Assume the same cross as in question 29.Which of the following phenotypic ratios would be represented in the F2 generation?

Bateson and Punnett could not adequately explain unusual genetic ratios that occurred as a result of linkage.

A recessive factor is one that cannot manifest itself in the phenotype.

Lack of dominance means that only recessive genes are present.

In a cross between a long and a globe-shaped radish, the F1 generation consisted of 247 oval-shaped radishes.The F2 generation consisted of 62 long radishes, 127 oval radishes, and 59 globe-shaped radishes.Which of the following pertaining to this cross is true?

The genetic information encoded in DNA is difficult to alter, making mutations rare.

What Is Plant Biology

The Nature of Life

Cells

Tissues

Roots and Soils

Stems

Leaves

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdombacteria, Domain King-Domarchaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants: Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

Biomes

Filters

_ and __ are molecular processes that convert genetic information into functional proteins.

Assume the same cross as in question 29.Which of the following phenotypic ratios would be represented in the F₂ generation?

In a cross between a long and a globe-shaped radish, the F₁ generation consisted of 247 oval-shaped radishes.The F₂ generation consisted of 62 long radishes, 127 oval radishes, and 59 globe-shaped radishes.Which of the following pertaining to this cross is true?