BIOL 1201 EXAMS: LATEST A+ GUIDE WITH ESSENTIAL
QUESTIONS AND ANSWERS
What process is responsible for the independent assortment of alleles?
Meiosis
the role of _______ is to separate homologous chromosomes and their respective alleles, which are
assorted in an independent manner
meiosis
How do cells acquire homologous chromosome pairs that carry the alleles that are independently
assorted?
A) DNA Replication
B) Fusion of gametes
C) Mitosis
D) Meiosis
B
During ___________, gametes bring together homologous chromosomes to generate a diploid
individual.
fertilization
Which of the following statements most accurately describes the process of independent assortment?
A) Dominant alleles segregate with recessive alleles
B) Genes located on the same chromosome assort as an independent unit
C) Alleles found on separate chromosomes segregate based upon their origin
D) Alleles of different genes segregate from one another in a random manner
D
The random distribution of alleles is required for ________________
independent assortment
True or false? The principle of independent assortment is best illustrated by events that take place
during metaphase II, during which sister chromatids segregate independently of each other.
False
The principle of independent assortment is best illustrated by events that take place during
_______________, during which nonhomologous chromosomes segregate independently of each
other.
metaphase I
How many genetically unique types of gametes could be produced by an individual with the genotype
RrYY?
, A) Three
B) Eight
C) Two
D) One
C (The gametes would be either RY or rY)
Which of the following parental genotypes would yield a 1:1:1:1 phenotypic ratio in the offspring?
A) AaBb, AaBb
B) AaBb, aabb
C) aaBb, aabb
D) aaBb, AaBb
B (The offspring of these parents would have a phenotypic ratio of 1:1:1:1)
What is the difference between heterozygous and homozygous individuals?
A) Heterozygotes carry two copies of a gene while homozygotes only carry one.
B) Homozygotes have one chromosome while heterozygotes have two similar chromosomes.
C) The homozygote will express the dominant trait and the heterozygote will express the recessive
trait.
D) All of the gametes from a homozygote carry the same version of the gene while those of a
heterozygote will differ.
D
Since ___________ carry two identical copies of a gene, all of the gametes will carry the same version.
homozygotes
___________ have two different versions, so there will be two different types of gametes.
Heterozygotes
When constructing a Punnett square, the symbols on the outside of the boxes represent _______,
while those inside the boxes represent _______.
A) gametes, parents
B) parents, gametes
C) gametes, progeny
D) progeny, gametes
C
The ___________ is representing all of the possible combinations of the gametes from each parent,
with the progeny represented in the interior of each box.
Punnett square
True or false? The same phenotype can be produced by more than one genotype.
True
QUESTIONS AND ANSWERS
What process is responsible for the independent assortment of alleles?
Meiosis
the role of _______ is to separate homologous chromosomes and their respective alleles, which are
assorted in an independent manner
meiosis
How do cells acquire homologous chromosome pairs that carry the alleles that are independently
assorted?
A) DNA Replication
B) Fusion of gametes
C) Mitosis
D) Meiosis
B
During ___________, gametes bring together homologous chromosomes to generate a diploid
individual.
fertilization
Which of the following statements most accurately describes the process of independent assortment?
A) Dominant alleles segregate with recessive alleles
B) Genes located on the same chromosome assort as an independent unit
C) Alleles found on separate chromosomes segregate based upon their origin
D) Alleles of different genes segregate from one another in a random manner
D
The random distribution of alleles is required for ________________
independent assortment
True or false? The principle of independent assortment is best illustrated by events that take place
during metaphase II, during which sister chromatids segregate independently of each other.
False
The principle of independent assortment is best illustrated by events that take place during
_______________, during which nonhomologous chromosomes segregate independently of each
other.
metaphase I
How many genetically unique types of gametes could be produced by an individual with the genotype
RrYY?
, A) Three
B) Eight
C) Two
D) One
C (The gametes would be either RY or rY)
Which of the following parental genotypes would yield a 1:1:1:1 phenotypic ratio in the offspring?
A) AaBb, AaBb
B) AaBb, aabb
C) aaBb, aabb
D) aaBb, AaBb
B (The offspring of these parents would have a phenotypic ratio of 1:1:1:1)
What is the difference between heterozygous and homozygous individuals?
A) Heterozygotes carry two copies of a gene while homozygotes only carry one.
B) Homozygotes have one chromosome while heterozygotes have two similar chromosomes.
C) The homozygote will express the dominant trait and the heterozygote will express the recessive
trait.
D) All of the gametes from a homozygote carry the same version of the gene while those of a
heterozygote will differ.
D
Since ___________ carry two identical copies of a gene, all of the gametes will carry the same version.
homozygotes
___________ have two different versions, so there will be two different types of gametes.
Heterozygotes
When constructing a Punnett square, the symbols on the outside of the boxes represent _______,
while those inside the boxes represent _______.
A) gametes, parents
B) parents, gametes
C) gametes, progeny
D) progeny, gametes
C
The ___________ is representing all of the possible combinations of the gametes from each parent,
with the progeny represented in the interior of each box.
Punnett square
True or false? The same phenotype can be produced by more than one genotype.
True
