Genetics Review
Game
Cell Cycle
Mitosis Vs.
Meiosis
Mendelian
Problems
Beyond
Mendel
Linked Genes
Chi-Square
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For a newly evolving organism,
what would be the advantage of
using sexual reproduction rather
than asexual reproduction?
A
Sexual reproduction would
allow for new genetic
combinations of offspring. This
gives the organism a chance to
adapt to its environment.
How do the daughter cells at the end of mitosis
and cytokinesis compare with their parent cell
when it was in G1 of the cell cycle?
a.
The daughter cells have half the amount of
cytoplasm and half the amount of DNA.
b.
The daughter cells have half the number of
chromosomes and half the amount of DNA.
c.
The daughter cells have the same number of
chromosomes and half the amount of DNA.
d.
The daughter cells have the same number of
chromosomes and the same amount of DNA.
e.
The daughter cells have the same number of
chromosomes and twice the amount of DNA.
.
A
d. The daughter cells have the
same number of chromosomes
and the same amount of DNA
Besides the ability of some
cancer cells to reproduce more
rapidly, what else could
logically result in a tumor?
A
A malfunction of apoptosis
If cyclin was always available in
the cell at high concentrations,
what effect would this have on
the cell cycle?
A
Cells would progress through
mitosis even when they were not
ready
Which protein is synthesized at a
constant rate during the cell cycle
that associates with a kinase to form
a catalytically active complex?
A
cyclin
If the DNA content of a diploid
cell in the G1 phase of the cell
cycle is x, then the DNA content
of the same cell at the start of
meiosis would be
A
2x
Which of the following is true of a species
that has a chromosome number of 2n = 8?
a.
The species is diploid with 16
chromosomes per cell.
b. The species has 8 sets of chromosomes
per cell.
c.
Each cell has 4 homologous pairs.
d. During the S phase of the cell cycle
there will be 16 separate chromosomes.
e. A gamete from this species has 2
chromosomes.
A
c. Each cell has 4 homologous
pairs
Homologous Chromosomes are
separated from each other.
a.
The statement is true for mitosis only.
b. The statement is true for meiosis I only.
c.
The statement is true for meiosis II only.
d. The statement is true for mitosis and
meiosis I.
e.
The statement is true for mitosis and
meiosis II.
A
b. The statement is true for
meiosis I only
At which stage of meiosis
(I or II) does the cell go
from a diploid to a haploid
cell?
A
Meiosis I
At which stages of mitosis
and meiosis are sister
chromatids are separated
from each other?
A
Mitosis and Meiosis II
Two plants are crossed, resulting in
offspring with a 3:1 ratio for a
particular trait. This suggests
a.
that the parents were true-breeding for
contrasting traits.
b. incomplete dominance.
c.
that a blending of traits has occurred.
d. that the parents were both
heterozygous.
e.
that each offspring has the same
alleles.
A
d. that the parents were both
heterozygous
Two plants are crossed, resulting in
offspring with a 1:1 ratio for a
particular trait. This suggests
a.
that the parents were true-breeding for
contrasting traits.
b.
incomplete dominance.
c.
that a blending of traits has occurred.
d.
That one parent was heterozygous and one
parent was homozygous recessive.
e.
that each offspring has the same alleles.
A
d. That one parent was
heterozygous and one parent
was homozygous recessive
Two plants are crossed, resulting in
offspring that all showed a single trait
a.
that the parents were true-breeding for contrasting
traits.
b.
incomplete dominance.
c.
that a blending of traits has occurred.
d.
That one parent was heterozygous and one parent
was homozygous recessive.
e.
that each offspring has the same alleles.
A
a. that the parents were truebreeding for contrasting traits.
A sexually reproducing animal has two
unlinked genes, one for head shape (H) and
one for tail length (T). Its genotype is HhTt.
Which of the following genotypes is
possible in a gamete from this organism?
a.
b.
c.
d.
e.
HT
Hh
HhTt
T
tt
A
a. HT
Two true-breeding stocks of pea plants
are crossed. One parent has red, axial
flowers and the other has white,
terminal flowers; all individuals have
red, axial flowers. The genes for flower
color and location assort independently.
If 1,000 offspring resulted from the
cross, approximately how many of
them would you expect to have red,
terminal flowers?
A
3/16 x 1000 = 187.5
A 1:2:1 phenotypic ratio in the
generation of a monohybrid
cross is a sign of
a.
b.
c.
d.
e.
complete dominance.
multiple alleles.
incomplete dominance.
polygenic inheritance.
pleiotropy.
A
c. incomplete dominance.
What is Epistasis?
A
When 1 gene locus alters the
expression of a second
locus.
What is polygenic
Inheritance?
A
Several genes govern the
inheritance of the trait.
If you’re type A blood, what
combinations of alleles can you
have?
Type AB blood?
A
Type A: IA IA or IAi
Type AB:
A
B
I I
Males are more often affected
by sex-linked traits than females
because
A
Males only have 1 copy of the X
chromosome
Gene A-B have a recombination
frequency of 25%
Gene A-C have a recombination
frequency of 35%
Which gene is further from gene A on
the chromosome, gene B or Gene C?
A
Gene C is further from gene A
What would you expect to see in
the phenotypic ratios of
offspring between a parent
AaBb x aabb
If gene A and gene B are on the
same chromosome?
A
The parental phenotypes would
show a higher proportion than
the recombinant phenotypes
Can you tell if genes are linked
if they have over a 50%
recombination frequency?
A
No, if they had a 50%
recombination frequency, the
phenotypic ratios of the
offspring would be the same as
if the genes were on separate
chromosomes
If the Chi-Square value you
calculate is LOWER than the
critical value at 0.05, what
does this tell you?
A
Accept the null hypothesis. Any
differences between your
observed value and your
expected value is likely due to
random chance
If the Chi-Square value you
calculate is HIGHER than the
critical value at 0.05, what does
this tell you?
A
Reject the null hypothesis. Any
differences between your
observed value and your
expected value is likely NOT
due to random chance