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8th Grade Unit 1 Quarterly Review-Genetics-2020
Test Description: Quarterly review used for 2020
Instructions: Answer all questions to get your test result.
1) How do the parts of a flower aid in its survival?
A
Decreases the chances of being killed by other animals
B
Increases the chances of successful reproduction
C
There is no effect at all in survival
D
Decreases the chances of pollination
2) What is true about asexual reproduction?
A
The genetic variation decreases
B
It has a variety of traits.
C
Chances of survival increases
D
It needs 2 parents
3) Why is genetic variation beneficial?
A
It increases the chances of survival and reproduction in specific environments.
B
It only needs one parent for reproduction
C
A species can live where it wants to
D
There are less adaptations needed
4) Crossing two heterozygous tall plants (Tt) will result in offspring of
A
2 homozygous tall and 2 homozygous short plants
B
All heterozygous tall
C
2 heterozygous tall and 2 homozygous tall plants
D
1 homozygous tall, 2 heterozygous tall, and one homozygous short plant
5) What is a phenotype?
A
How organisms reproduce.
B
A type of protein
C
Genetic Code
D
Physical Appearance
6) What is an example of a heterozygous allele?
A
Hh
B
HH
C
Hhh
D
hh
7) Certain animal behaviors increase
A
food intake
B
mortality rate
C
None of the answers are correct
D
reproductive success
8) What is an example of a homozygous allele?
A
TT
B
ttt
C
Tt
D
tTt
9) What is a genotype?
A
Something that makes up DNA.
B
Genetic Make-up
C
Physical Appearance
D
What makes you identical to your parent.
10) What is true about squirrel reproduction?
A
The offspring are always genetically identical to both of their parents.
B
A set of identical chromosomes is passed on to the offspring
C
They reproduce sexually because two parents contribute genetic material to the offspring.
D
All offspring are identical genetically to each other.
11) What is true about squirrel reproduction?
A
The offspring have genetic variation.
B
All offspring are identical genetically to each other
C
A set of identical chromosomes is passed on to the offspring
D
The offspring are always genetically identical to both of their parents.
12) Explain how it is possible for two brown furred squirrels to have a white furred offspring?
A
If both parents are homozygous dominant.
B
If both parents are heterozygous.
C
If the parents have asexual reproduction
D
If each offspring gets 100% of its genes from each parent.
13) If a white squirrel that lives in the woods in Odenton is born with this as a mutation, what prediction can be made about the mutation?
A
This mutation would be neutral because fur color will not affect the survival of the squirrel.
B
This mutation would be beneficial because it would help the squirrel blend into the environment.
C
There is no way to determine if this mutation would be beneficial, harmful or have no effect at all.
D
This mutation would be a harmful mutation because it would make the squirrel more visible to predators.
14) Which description best supports that squirrels are sexually reproducing organisms?
A
Squirrels can reproduce at a couple months old.
B
The habitat of squirrels includes open grassy areas and trees
C
They have a very thick coat of hair and can see extremely well.
D
The breeding season for males and females varies from year to year.
15) How do animals help with plant reproduction?
A
They eat the leaves.
B
All answer choices are correct.
C
They eat the seeds and poop them out elsewhere.
D
They camouflage themselves to the color of the plants.
16) What is the difference between a dominant and recessive allele?
A
Dominant alleles are represented with a lowercase letter, while recessive alleles are represented with a capital letter.
B
The dominant trait will only be seen if you have two dominant alleles.
C
The recessive allele will be seen, while the dominant allele will be hidden.
D
The dominant allele will be expressed, while the recessive allele will be hidden.
17) Cancer is an example of a
A
both a beneficial and harmful mutation
B
neutral mutation
C
beneficial mutation
D
harmful mutation
18) What do mutations cause?
A
Chromosomes switch places.
B
Siblings that look identical.
C
Temporary change to your DNA
D
Permanent changes to proteins that cause changes in a trait
19) Fluffy fur is a dominant trait in guinea pigs. Two fluffy guinea pigs have a non-fluffy offspring. What must be the genotypes of the parents?
A
FF and FF
B
Ff and Ff
C
ff and ff
D
Ff and FF
20) If two heterozygous individuals are mated, what percentage of their offspring will have the dominant phenotype?
A
50%
B
100%
C
25%
D
75%
*select an answer for all questions
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