Bio 100 Exam #2- Genetics and Evolution
UPDATED ACTUAL Exam Questions and
CORRECT Answers
How many chromosomes do human body cells have? - CORRECT ANSWER - 46
A somatic cell that contains two matched sets of chromosomes has a configuration known as
_____________? - CORRECT ANSWER - Diploid
what type of configuration do gametes have? - CORRECT ANSWER - Haploid
During ______________, the cell grows and DNA is replicated. - CORRECT ANSWER -
Interphase
What results from mitosis? - CORRECT ANSWER - 2 daughter cells each diploid (2n)
This Phase of mitosis: The centrosomes begin to move to opposite poles of the cell. The
microtubules that form the basis of the mitotic spindle extend between the centrosomes, pushing
them farther apart as the microtubule fibers lengthen. The sister chromatids begin to coil more
tightly and become visible under a light microscope.
telophase - CORRECT ANSWER - Prophase
This Phase of mitosis: All of the chromosomes are aligned at the equatorial plane, midway
between the two poles of the cell. The sister chromatids are still tightly attached to each other. At
this time, the chromosomes are maximally condensed - CORRECT ANSWER -
Metaphase
This Phase of mitosis: the sister chromatids at the equatorial plane are split apart at the
centromere. Each chromatid, now called a chromosome, is pulled rapidly toward the centrosome
to which its microtubule was attached - CORRECT ANSWER - Anaphase
, This phase of MITOSIS: The chromosomes reach the opposite poles and begin to decondense
(unravel). The mitotic spindles are broken down into monomers that will be used to assemble
cytoskeleton components for each daughter cell. Nuclear envelopes form around chromosomes.
replication phase - CORRECT ANSWER - Telophase
Which chromosomes are the single exception to the rule of homologous chromosomes? -
CORRECT ANSWER - Sex chromosomes X and Y
What do we call different versions of a gene? - CORRECT ANSWER - Alleles
What results from meiosis? - CORRECT ANSWER - Gametes
What does a gene code for? - CORRECT ANSWER - A protein
This gamete ghL can result from which genotype? (2) - CORRECT ANSWER - GgHhLl;
gghhLL
Which of thee following can result from crossing Dd x Dd (3) - CORRECT ANSWER -
DD; dd; Dd
In this hypothetical example the trait of fur color is governed by a single gene (f or F).
Individuals with red fur are indicated as red in the diagram and those with white fur are indicated
as white in the diagram. If A and B are both homozygotes for the trait of fur color, what is the
chance that individual H is a homozygote? - CORRECT ANSWER - 50%
What do we call the actual expression of the alleles of an organism? - CORRECT
ANSWER - Phenotype
If a trait appears in the phenotype of an offspring, but not in either parent, then it must be due to
WHAT allele. - CORRECT ANSWER - A recessive
UPDATED ACTUAL Exam Questions and
CORRECT Answers
How many chromosomes do human body cells have? - CORRECT ANSWER - 46
A somatic cell that contains two matched sets of chromosomes has a configuration known as
_____________? - CORRECT ANSWER - Diploid
what type of configuration do gametes have? - CORRECT ANSWER - Haploid
During ______________, the cell grows and DNA is replicated. - CORRECT ANSWER -
Interphase
What results from mitosis? - CORRECT ANSWER - 2 daughter cells each diploid (2n)
This Phase of mitosis: The centrosomes begin to move to opposite poles of the cell. The
microtubules that form the basis of the mitotic spindle extend between the centrosomes, pushing
them farther apart as the microtubule fibers lengthen. The sister chromatids begin to coil more
tightly and become visible under a light microscope.
telophase - CORRECT ANSWER - Prophase
This Phase of mitosis: All of the chromosomes are aligned at the equatorial plane, midway
between the two poles of the cell. The sister chromatids are still tightly attached to each other. At
this time, the chromosomes are maximally condensed - CORRECT ANSWER -
Metaphase
This Phase of mitosis: the sister chromatids at the equatorial plane are split apart at the
centromere. Each chromatid, now called a chromosome, is pulled rapidly toward the centrosome
to which its microtubule was attached - CORRECT ANSWER - Anaphase
, This phase of MITOSIS: The chromosomes reach the opposite poles and begin to decondense
(unravel). The mitotic spindles are broken down into monomers that will be used to assemble
cytoskeleton components for each daughter cell. Nuclear envelopes form around chromosomes.
replication phase - CORRECT ANSWER - Telophase
Which chromosomes are the single exception to the rule of homologous chromosomes? -
CORRECT ANSWER - Sex chromosomes X and Y
What do we call different versions of a gene? - CORRECT ANSWER - Alleles
What results from meiosis? - CORRECT ANSWER - Gametes
What does a gene code for? - CORRECT ANSWER - A protein
This gamete ghL can result from which genotype? (2) - CORRECT ANSWER - GgHhLl;
gghhLL
Which of thee following can result from crossing Dd x Dd (3) - CORRECT ANSWER -
DD; dd; Dd
In this hypothetical example the trait of fur color is governed by a single gene (f or F).
Individuals with red fur are indicated as red in the diagram and those with white fur are indicated
as white in the diagram. If A and B are both homozygotes for the trait of fur color, what is the
chance that individual H is a homozygote? - CORRECT ANSWER - 50%
What do we call the actual expression of the alleles of an organism? - CORRECT
ANSWER - Phenotype
If a trait appears in the phenotype of an offspring, but not in either parent, then it must be due to
WHAT allele. - CORRECT ANSWER - A recessive
