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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
Albert Einstein
B
Charles Darwin
C
Gregor Mendel
D
Edwin Genetics
2) When pollen from one plant reaches the flower of a different plant, it is called
A
Mendel pollination
B
cross-pollination
C
self-pollination
D
natural pollination
3) In the first generation, Mendel got plants that had
A
light purple flowers
B
all white flowers
C
some purple and some white flowers
D
all purple flowers
4) The ratio of dominant to recessive traits is about
A
3:2
B
3:1
C
2:1
D
4:2
5) A genetic factor that blocks another genetic factor is called a
A
recessive trait
B
dominant trait
C
incomplete dominant trait
D
codominant trait
6) Mendel's genetic factors are located on
A
chromosomes
B
mitochondria
C
the cell membrane
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 pink flower
B
a red flower
C
a red and white spotted flower
D
a white flower
10) In codominance, a white cow crossed with a brown cow would produce a
A
tan cow
B
spotted cow
C
brown cow
D
white cow
11) Who used X-rays to figure out the shape of DNA?
A
Chargaff
B
Mendel
C
Watson and Crick
D
Franklin and Wilkins
12) Which base matches with cytosine?
A
cytosine
B
adenine
C
thymine
D
guanine
13) The process of copying a DNA molecule to make another DNA molecule is called
A
replication
B
transcription
C
revolution
D
translation
14) T/F: About 97% of a human's DNA is junk DNA.
A
false
B
true
15) RNA is different from DNA in that it
A
has the sugar ribose instead of deoxyribose
B
all of the above
C
is a single helix
D
has uracil instead of thymine
16) The type of RNA that carries amino acids to ribosomes is called
A
tRNA
B
mRNA
C
rRNA
D
rDNA
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
no genes
C
one gene
D
the environment
20) The different forms of a gene are called
A
DNA
B
chromosomes
C
alleles
D
ribosomes
*select an answer for all questions
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