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8th Grade Unit 1 Review
Test Description: Review of Unit 1 8th Grade in AACPS.
Instructions: Answer all questions to get your test result.
1) The colors and scents of plants attract helpful insects and repel insects that feed on them. The production of the proteins that provide these colors and scents is the direct result of
A
presence of specific genes
B
the genetic makeup of the surrounding vegetation
C
behavior learned from parent plants
D
inability of plants to move as animals do
2) A scientist cloned a goat. Which of these is a true statement about the goat?
A
It has new genes and traits.
B
It lacks the genes for reproduction.
C
It has genes that are identical to the original goat.
D
It looks the same as the original goat but has different genes.
3) Scientists insert a human gene for insulin into the DNA of bacteria. This causes the bacteria to produce human insulin. The insulin is used to treat diabetes in humans. This is an example of:
A
Mutation
B
Sexual Reproduction
C
Genetic Engineering
D
Selective Breeding
4) How many parents does asexual reproduction involve?
A
One
B
Four
C
Three
D
Two
5) The offspring from asexually reproduced organisms are?
A
Identical to parents
B
Different than their parents
C
A different species
D
Like a combination from both parents
6) If two organisms reproduce sexually, then their offspring will exhibit a genetic makeup that is -
A
identical to only one parent
B
a unique combination of traits
C
the recessive traits of each parent
D
identical to all of its siblings
7) When comparing the offspring of sexually and asexually reproducing organisms, we would expect the genetic material (DNA) of the sexually reproducing organism to -
A
show more variation
B
be simpler overall
C
contain fewer mutations
D
be lesser in quantity
8) The genetic material of an offspring of sexually reproducing organisms is best described as–
A
genes from both parents, in unique combinations
B
identical to that of the other offspring
C
a copy of the genetic material of the mother
D
a copy of the genetic material of the father
9) The passing of physical characteristics from parent to offspring is called ________.
A
dominant
B
brown eyes
C
heredity
D
recessive
10) Heterozygous is when...
A
the alleles are present
B
the alleles are different
C
the alleles are absent
D
the alleles are the same
11) In a heterozygous genotype, the ___________ allele takes over in the phenotype.
A
dominant
B
lower case letter
C
recessive
D
both
12) Which of the following is homozygous recessive?
A
Tt
B
TT
C
T
D
tt
13) Sources of variations include _______ and ______?
A
asexual reproduction, mutations
B
biological evolution, genetics
C
biological evolution, genetics
D
sexual reproduction, mutations
14) What is the definition of natural selection?
A
Genes that are chosen by scientist and academics.
B
Genes that are chosen by humans such as farmers and ranchers
C
Organisms that are chosen by environmental pressures such as climate, available food, predators and habitat.
D
Dogs and Wolves
15) The Aztecs and Maya Tribes of Mexico where some of the first humans to slowly change wild corn to the corn we know today. What process did these tribes use?
A
Genetic Engineering
B
Gene Therapy
C
Artificial Selection
D
Natural Selection
16) What are the X shape structures which contain DNA called?
A
Allele
B
DNA
C
Gene
D
Chromosome
17) What is the greatest advantage of being a sexual organism?
A
If one dies they all die
B
All offspring are genetically identical and can survive a new virus, bacteria or environmental change
C
All organisms are identical
D
All offspring are genetically different and can survive a new virus, bacteria or environmental change
18) What is one advantage of being an asexual organism?
A
Only bacteria are asexual
B
You need a mate to reproduce
C
asexual and sexual is the same thing
D
You can reproduce at any time without a mate
*select an answer for all questions
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