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7th Grade Ch 5
Test Description: Genetics
Instructions: Answer all questions to get your test result.
1) Who is the father of genetics?
A
Edwin Genetics
B
Charles Darwin
C
Albert Einstein
D
Gregor Mendel
2) When pollen from one plant reaches the flower of a different plant, it is called
A
self-pollination
B
natural pollination
C
Mendel pollination
D
cross-pollination
3) In the first generation, Mendel got plants that had
A
some purple and some white flowers
B
light purple flowers
C
all white flowers
D
all purple flowers
4) The ratio of dominant to recessive traits is about
A
3:1
B
2:1
C
4:2
D
3:2
5) A genetic factor that blocks another genetic factor is called a
A
codominant trait
B
incomplete dominant trait
C
dominant trait
D
recessive trait
6) Mendel's genetic factors are located on
A
chromosomes
B
the cell membrane
C
mitochondria
D
eggs only
7) T/F: You can see an organism's genotype
A
false
B
true
8) Which of the following phenotypes is heterozygous?
A
rr
B
RR
C
Rr
9) In incomplete dominance, a red flower crossed with a white flower would produce
A
a red flower
B
a red and white spotted flower
C
a white flower
D
a pink flower
10) In codominance, a white cow crossed with a brown cow would produce a
A
white cow
B
brown cow
C
spotted cow
D
tan cow
11) Who used X-rays to figure out the shape of DNA?
A
Mendel
B
Watson and Crick
C
Chargaff
D
Franklin and Wilkins
12) Which base matches with cytosine?
A
thymine
B
guanine
C
adenine
D
cytosine
13) The process of copying a DNA molecule to make another DNA molecule is called
A
transcription
B
replication
C
revolution
D
translation
14) T/F: About 97% of a human's DNA is junk DNA.
A
true
B
false
15) RNA is different from DNA in that it
A
has uracil instead of thymine
B
all of the above
C
is a single helix
D
has the sugar ribose instead of deoxyribose
16) The type of RNA that carries amino acids to ribosomes is called
A
mRNA
B
rRNA
C
rDNA
D
tRNA
17) T/F: Most mistakes made in DNA replications are corrected.
A
False
B
True
18) T/F: All mutations result in unfortunate (bad) results.
A
false
B
true
19) Polygenic inheritance occurs when ___ determine the phenotype of a trait.
A
multiple genes
B
the environment
C
one gene
D
no genes
20) The different forms of a gene are called
A
alleles
B
DNA
C
ribosomes
D
chromosomes
*select an answer for all questions
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