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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
behavior learned from parent plants
B
inability of plants to move as animals do
C
the genetic makeup of the surrounding vegetation
D
presence of specific genes
2) A scientist cloned a goat. Which of these is a true statement about the goat?
A
It has genes that are identical to the original goat.
B
It has new genes and traits.
C
It lacks the genes for reproduction.
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
Genetic Engineering
B
Mutation
C
Selective Breeding
D
Sexual Reproduction
4) How many parents does asexual reproduction involve?
A
Three
B
Four
C
Two
D
One
5) The offspring from asexually reproduced organisms are?
A
Different than their parents
B
Like a combination from both parents
C
A different species
D
Identical to parents
6) If two organisms reproduce sexually, then their offspring will exhibit a genetic makeup that is -
A
the recessive traits of each parent
B
identical to only one parent
C
identical to all of its siblings
D
a unique combination of traits
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
be lesser in quantity
B
be simpler overall
C
contain fewer mutations
D
show more variation
8) The genetic material of an offspring of sexually reproducing organisms is best described as–
A
genes from both parents, in unique combinations
B
a copy of the genetic material of the mother
C
a copy of the genetic material of the father
D
identical to that of the other offspring
9) The passing of physical characteristics from parent to offspring is called ________.
A
brown eyes
B
dominant
C
recessive
D
heredity
10) Heterozygous is when...
A
the alleles are different
B
the alleles are present
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
recessive
C
lower case letter
D
both
12) Which of the following is homozygous recessive?
A
T
B
TT
C
tt
D
Tt
13) Sources of variations include _______ and ______?
A
asexual reproduction, mutations
B
biological evolution, genetics
C
sexual reproduction, mutations
D
biological evolution, genetics
14) What is the definition of natural selection?
A
Genes that are chosen by humans such as farmers and ranchers
B
Dogs and Wolves
C
Genes that are chosen by scientist and academics.
D
Organisms that are chosen by environmental pressures such as climate, available food, predators and habitat.
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
Gene Therapy
B
Genetic Engineering
C
Artificial Selection
D
Natural Selection
16) What are the X shape structures which contain DNA called?
A
Allele
B
Chromosome
C
DNA
D
Gene
17) What is the greatest advantage of being a sexual organism?
A
All offspring are genetically different and can survive a new virus, bacteria or environmental change
B
All offspring are genetically identical and can survive a new virus, bacteria or environmental change
C
If one dies they all die
D
All organisms are identical
18) What is one advantage of being an asexual organism?
A
Only bacteria are asexual
B
You can reproduce at any time without a mate
C
asexual and sexual is the same thing
D
You need a mate to reproduce
*select an answer for all questions
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