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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
Charles Darwin
B
Gregor Mendel
C
Edwin Genetics
D
Albert Einstein
2) When pollen from one plant reaches the flower of a different plant, it is called
A
cross-pollination
B
Mendel pollination
C
self-pollination
D
natural pollination
3) In the first generation, Mendel got plants that had
A
all white flowers
B
light purple flowers
C
all purple flowers
D
some purple and some white flowers
4) The ratio of dominant to recessive traits is about
A
3:1
B
3:2
C
2:1
D
4:2
5) A genetic factor that blocks another genetic factor is called a
A
dominant trait
B
recessive trait
C
incomplete dominant trait
D
codominant trait
6) Mendel's genetic factors are located on
A
the cell membrane
B
chromosomes
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 pink flower
D
a white flower
10) In codominance, a white cow crossed with a brown cow would produce a
A
tan cow
B
white cow
C
spotted cow
D
brown cow
11) Who used X-rays to figure out the shape of DNA?
A
Chargaff
B
Franklin and Wilkins
C
Watson and Crick
D
Mendel
12) Which base matches with cytosine?
A
adenine
B
thymine
C
cytosine
D
guanine
13) The process of copying a DNA molecule to make another DNA molecule is called
A
transcription
B
replication
C
translation
D
revolution
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
is a single helix
C
has the sugar ribose instead of deoxyribose
D
all of the above
16) The type of RNA that carries amino acids to ribosomes is called
A
rRNA
B
tRNA
C
mRNA
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
the environment
B
one gene
C
no genes
D
multiple genes
20) The different forms of a gene are called
A
ribosomes
B
alleles
C
DNA
D
chromosomes
*select an answer for all questions
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