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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 pollination
B
There is no effect at all in survival
C
Increases the chances of successful reproduction
D
Decreases the chances of being killed by other animals
2) What is true about asexual reproduction?
A
It needs 2 parents
B
The genetic variation decreases
C
It has a variety of traits.
D
Chances of survival increases
3) Why is genetic variation beneficial?
A
There are less adaptations needed
B
A species can live where it wants to
C
It increases the chances of survival and reproduction in specific environments.
D
It only needs one parent for reproduction
4) Crossing two heterozygous tall plants (Tt) will result in offspring of
A
2 homozygous tall and 2 homozygous short plants
B
1 homozygous tall, 2 heterozygous tall, and one homozygous short plant
C
2 heterozygous tall and 2 homozygous tall plants
D
All heterozygous tall
5) What is a phenotype?
A
Genetic Code
B
Physical Appearance
C
A type of protein
D
How organisms reproduce.
6) What is an example of a heterozygous allele?
A
Hhh
B
HH
C
hh
D
Hh
7) Certain animal behaviors increase
A
mortality rate
B
reproductive success
C
None of the answers are correct
D
food intake
8) What is an example of a homozygous allele?
A
tTt
B
TT
C
Tt
D
ttt
9) What is a genotype?
A
What makes you identical to your parent.
B
Physical Appearance
C
Something that makes up DNA.
D
Genetic Make-up
10) What is true about squirrel reproduction?
A
They reproduce sexually because two parents contribute genetic material to the offspring.
B
The offspring are always genetically identical to both of their parents.
C
All offspring are identical genetically to each other.
D
A set of identical chromosomes is passed on to the offspring
11) What is true about squirrel reproduction?
A
The offspring are always genetically identical to both of their parents.
B
The offspring have genetic variation.
C
A set of identical chromosomes is passed on to the offspring
D
All offspring are identical genetically to each other
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 each offspring gets 100% of its genes from each parent.
C
If both parents are heterozygous.
D
If the parents have asexual reproduction
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 a harmful mutation because it would make the squirrel more visible to predators.
C
This mutation would be beneficial because it would help the squirrel blend into the environment.
D
There is no way to determine if this mutation would be beneficial, harmful or have no effect at all.
14) Which description best supports that squirrels are sexually reproducing organisms?
A
The breeding season for males and females varies from year to year.
B
Squirrels can reproduce at a couple months old.
C
They have a very thick coat of hair and can see extremely well.
D
The habitat of squirrels includes open grassy areas and trees
15) How do animals help with plant reproduction?
A
They eat the leaves.
B
They eat the seeds and poop them out elsewhere.
C
All answer choices are correct.
D
They camouflage themselves to the color of the plants.
16) What is the difference between a dominant and recessive allele?
A
The recessive allele will be seen, while the dominant allele will be hidden.
B
The dominant allele will be expressed, while the recessive allele will be hidden.
C
Dominant alleles are represented with a lowercase letter, while recessive alleles are represented with a capital letter.
D
The dominant trait will only be seen if you have two dominant alleles.
17) Cancer is an example of a
A
neutral mutation
B
beneficial mutation
C
both a beneficial and harmful mutation
D
harmful mutation
18) What do mutations cause?
A
Siblings that look identical.
B
Chromosomes switch places.
C
Permanent changes to proteins that cause changes in a trait
D
Temporary change to your DNA
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
25%
C
100%
D
75%
*select an answer for all questions
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