Question 1

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 2

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

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

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

Accepted Answer

A) True 
 B)False

Question 5

________ 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 these answers are correct. 
A)  Replication; mutation 
B)  Meiosis; mitosis 
C)  Transcription; translation 
D)  Semiconservative; replication 
E)  All of these answers are correct.

Question 6

A backcross is one in which both parents are homozygous.

Accepted Answer

A) True 
 B)False

Question 7

If the cross BbDD x bbDd is made, which of the following would NOT be represented in the offspring?

Accepted Answer

A)  BbDD 
B)  BbDd 
C)  bbDD 
D)  bbDd 
E)  BBDd 
A)  BbDD 
B)  BbDd 
C)  bbDD 
D)  bbDd 
E)  BBDd

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

A single pair of genes controls red versus blue flower color in larkspurs, and red is dominant phenotype. Which of the following phenotypes should occur in the F3 generation if the parental generation was pure breeding strains for red and blue phenotypes ?

Accepted Answer

A)  all blue 
B)  all purple 
C)  red and blue 
D)  red, purple, and blue 
E)  all red 
A)  all blue 
B)  all purple 
C)  red and blue 
D)  red, purple, and blue 
E)  all red

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is NOT known for the pioneer experiments and theories that led to the development of the science of genetics?

Accepted Answer

A)  Linnaeus 
B)  Correns 
C)  Mendel 
D)  de Vries 
E)  Morgan 
A)  Linnaeus 
B)  Correns 
C)  Mendel 
D)  de Vries 
E)  Morgan

Question 12

The Hardy-Weinberg law addresses itself to proportions of genes in a normally interbreeding population.

Accepted Answer

A) True 
 B)False

Question 13

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 14

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

Question 15

A tRNA molecule relays amino acids in response to a specific "blueprint" coded by the DNA.

Accepted Answer

A) True 
 B)False

Question 16

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 17

Which is a heterozygous genotype for a given trait?

Accepted Answer

A)  YY 
B)  Yy 
C)  WX 
D)  yy 
E)  none of these answers are correct 
A)  YY 
B)  Yy 
C)  WX 
D)  yy 
E)  none of these answers are correct

Question 18

In sweet peas, purple flower color and oblong pollen grains are dominant, with the recessives being red flower color and spherical pollen grains. When a homozygous purple, oblong plant is crossed with a homozygous red, spherical plant, the F1 generation consists entirely of purple, oblong plants. When an F1 plant is crossed with a homozygous red, spherical plant, the offspring are produced in a ratio of 7 purple, oblong to 1 purple, spherical to 1 red, oblong to 7 red, spherical. Which of the following is the only plausible explanation for such results?

Accepted Answer

A)  hybridization has occurred 
B)  linkage is involved 
C)  the plants received too much fertilizer 
D)  bad sex cells are involved 
E)  the plants resent scientists messing with their genes 
A)  hybridization has occurred 
B)  linkage is involved 
C)  the plants received too much fertilizer 
D)  bad sex cells are involved 
E)  the plants resent scientists messing with their genes

Question 19

Assume the same cross as in question 24. If the F2 generation involves thousands of individual plants that are carefully counted, and four different phenotypes in a ratio other than 9:3:3:1 are noted, which of the following would be suspected?

Accepted Answer

A)  absence of dominance 
B)  linkage 
C)  leakage of color 
D)  no crossing-over had occurred 
E)  genes were not involved in the cross 
A)  absence of dominance 
B)  linkage 
C)  leakage of color 
D)  no crossing-over had occurred 
E)  genes were not involved in the cross

Question 20

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.

Exam 13: Genetics

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

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

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?

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

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

A backcross is one in which both parents are homozygous.

If the cross BbDD x bbDd is made, which of the following would NOT be represented in the offspring?

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

A single pair of genes controls red versus blue flower color in larkspurs, and red is dominant phenotype. Which of the following phenotypes should occur in the F3 generation if the parental generation was pure breeding strains for red and blue phenotypes ?

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

Which of the following is NOT known for the pioneer experiments and theories that led to the development of the science of genetics?

The Hardy-Weinberg law addresses itself to proportions of genes in a normally interbreeding population.

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

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

A tRNA molecule relays amino acids in response to a specific "blueprint" coded by the DNA.

Which is a heterozygous genotype for a given trait?

Assume the same cross as in question 24. If the F2 generation involves thousands of individual plants that are carefully counted, and four different phenotypes in a ratio other than 9:3:3:1 are noted, which of the following would be suspected?

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

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 Kingdom Bacteria, Domain Kingdom Archaea, 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.

A single pair of genes controls red versus blue flower color in larkspurs, and red is dominant phenotype. Which of the following phenotypes should occur in the F₃ generation if the parental generation was pure breeding strains for red and blue phenotypes ?

Assume the same cross as in question 24. If the F₂ generation involves thousands of individual plants that are carefully counted, and four different phenotypes in a ratio other than 9:3:3:1 are noted, which of the following would be suspected?

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