Which process allows sexually reproducing organisms to create gametes with half the
number of chromosomes of the body cells?
Mito
sis
Meiosis
Ferti
lization
Reproducti
on
25% 25%25%25%1. Mitosis2. Meiosis3. Fertilization4. Reproduction
A branch cut off of a geranium plant grows into a new plant. Will the new plant be different
from its parent plant?
yes,
because
m...
yes,
because
m...
no, beca
use m
e...
no, beca
use th
...
25% 25%25%25%1. yes, because mitosis will take place in the new plant
2. yes, because meiosis will take place in the old plant.
3. no, because meiosis and fertilization did not take place.
4. no, because the new plant was formed from gametes.
Cats have many different possible coat colors. What does this show?
muta
tions occu
...
repro
duction i..
.
division of b
o...
varia
tion in s.
..
25% 25%25%25%1. mutations occurring in sexually reproducing organisms
2. reproduction in asexually reproducing organisms
3. division of body cells in adult organisms
4. variation in sexually reproducing organisms
What is true of asexual reproduction? Offspring that
are identica
l ...
rese
mble their.
..
are quite diff
...
are random and...
25% 25%25%25%1. are identical to their parents.
2. resemble their parents.
3. are quite different that their parents.
4. are random and can have different results each time.
What is the result of a single cell going through the process of meiosis?
one identica
l ...
two id
entical ..
.
thre
e identica
...
four g
amete ce...
25% 25%25%25%1. one identical new cell
2. two identical new cells
3. three identical haploid bodies
4. four gamete cells
What is an advantage of asexual reproduction?
the offsp
ring ...
the offsp
ring ...
there
are m
ore...
there
are fe
we...
25% 25%25%25%1. the offspring are not identical to their parents
2. the offspring are identical to their parents
3. there are more offspring produced
4. there are fewer offspring produced
Where are genes for sex-linked traits located?
They can be on...
On th
e “Y” c
hr...
On th
e “X” c
hr...
On ch
romoso
me ...
25% 25%25%25%1. They can be on any chromosome
2. On the “Y” chromosome
3. On the “X” chromosome
4. On chromosome pair # 21
A white flower crossed with a red flower produces pink offspring. This is an example of incomplete dominance.
If two of the pink-flowered plants are crossed, what ratio will the genotypes of the offspring have?
1 RR: 3 Rr
1 RR: 2 Rr:
1 ...
2 Rw: 2 W
w
3 Rr: 1 rr
25% 25%25%25%
1. 1 RR: 3 Rr2. 1 RR: 2 Rr: 1 rr3. 2 Rw: 2 Ww4. 3 Rr: 1 rr
Why are blood types considered an example of codominance?
there
are fo
ur...
blood type O
c...
blood types A
...
there
are th
re...
25% 25%25%25%1. there are four types of blood, not two
2. blood type O can be donated to anyone, AB cannot
3. blood types A and B will both be expressed when present
4. there are three alleles for blood type and four types of blood
How many pairs of homologous chromosomes do humans have?
4 22 46 52
25% 25%25%25%1. 42. 223. 464. 52
If two different alleles are present, which allele is expressed?
Recessi
ve
Dominant
Phenotype
Genotyp
e
25% 25%25%25%1. Recessive2. Dominant3. Phenotype4. Genotype
A tall pea plant (DD) and a tall pea plant (Dd) have what in common?
Phenotype
Genotyp
e
Alleles
Seed co
lor
25% 25%25%25%1. Phenotype2. Genotype3. Alleles4. Seed color
In crossing homozygous dominant and homozygous recessive pea plants, Mendel noted that some genes were not seen in the F1 generation and were seen in
only 25% of the F2 generation. What did he call these genes?
Dominant
Recessi
ve
Leth
al
Inco
mpletely
d...
25% 25%25%25%
1. Dominant2. Recessive3. Lethal4. Incompletely
dominant
One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). What is the probability of one of their offspring
having long hair?
100%75%
50%25%
25% 25%25%25%1. 100%2. 75%3. 50%4. 25%
A person with phenotype O blood has how many possible genotypes?
6 1 3 2
25% 25%25%25%1. 62. 13. 34. 2
Which pair of chromosomes produces a female offspring?
a female Y ch
r...
a female Y ch
r...
a female X ch
r...
a female X ch
r...
25% 25%25%25%1. a female Y chromosome and a male Y chromosome.
2. a female Y chromosome and a male X chromosome.
3. a female X chromosome and a male X chromosome.
4. a female X chromosome and a male Y chromosome.
Crossing a snap dragon that has red flowers with one that has white flowers produces a snap dragon with
pink flowers. The trait for flower color exhibits
Codominance
Inco
mplete dom...
Multi
ple allel...
Complete domin...
25% 25%25%25%1. Codominance2. Incomplete
dominance3. Multiple alleles4. Complete
dominance
On which of the following chromosomes would a sex-linked trait most likely be
found?
X Y O YO
25% 25%25%25%1. X2. Y3. O4. YO
An organism that has two identical alleles for the same trait is called _______ for that particular trait.
Homozy
gous
Hetero
zygo
us
Dominant
Recessi
ve
codominant
20% 20% 20%20%20%1. Homozygous2. Heterozygous3. Dominant4. Recessive5. codominant
In a heterozygous individual the allele being expressed is
rece
ssive
.
mask
ed.
redundant.
dominant.
25% 25%25%25%1. recessive.2. masked.3. redundant.4. dominant.
Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What would be the
appearance of a plant with the genotype PpTt?
purple flowers.
..
purple flowers.
..
white
flowers,...
white
flowers,...
pale purple fl...
20% 20% 20%20%20%1. purple flowers, tall2. purple flowers,
dwarf3. white flowers, tall4. white flowers, dwarf5. pale purple flowers,
intermediate height
One of the main reasons genes sort independent of one another is that
they p
roduce
unrelated ...
they p
roduce
relate
d traits
.
they a
re on th
e same c.
..
they a
re diff
erent a
lleles.
they a
re on diff
erent c
...
20% 20% 20%20%20%1. they produce unrelated traits.
2. they produce related traits.
3. they are on the same chromosome.
4. they are different alleles.5. they are on different
chromosomes.
A single gene has 3 or more alternative forms. These are called
hetero
zygote
s.
multi
ple allel...
homozygotes.
multi
ple zygo
t...
25% 25%25%25%1. heterozygotes.2. multiple alleles.3. homozygotes.4. multiple zygotes.
When Mendel crossed two purple-flowered pea plants with each other, he obtained a
phenotypic ratio of 3:1 (purple pea plants to white pea plants). What are the parents?
homozygous d
om...
homozygous d
om...
hetero
zygous p
...
hetero
zygous p
...
25% 25%25%25%1. homozygous dominant purple pea
plant and homozygous recessive white pea plant
2. homozygous dominant purple pea plant and heterozygous white pea plant
3. heterozygous purple pea plant and homozygous dominant purple pea plant
4. heterozygous purple pea plant and heterozygous purple pea plant
As a genetic counselor, you are constructing a human pedigree for a particular disease. You note that every generation shows the trait,
suggesting that it is
sex-l
inked.
rece
ssive
.
dominant.
cannot d
etermi...
25% 25%25%25%
1. sex-linked.2. recessive.3. dominant.4. cannot determine
from the information provided.
Gregor Mendel worked with what kind or plant?
Peas Corn
Wheat
Beans
25% 25%25%25%1. Peas2. Corn3. Wheat4. Beans
Each alternative form of a gene for a certain trait is called a(n)?
Genotyp
e Alle
le
Phenotype
Recessi
ve trai...
25% 25%25%25%1. Genotype2. Allele3. Phenotype4. Recessive trait
A woman who has type B blood marries a man who has type A blood. They have five children, all of which have type AB blood. What are the
most probable parental genotypes?
moth
er IBIB, f.
..
moth
er IBi ,
f...
Moth
er IBIB, f.
..
moth
er IBi, f
a...
25% 25%25%25%
1. mother IBIB, father IAIA
2. mother IBi , father IAi3. Mother IBIB, father
IAi4. mother IBi, father
IAIA
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