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DNA And Genetics (1)
Test Description: DNA and Genetics - Middle School - Life Science
Instructions: Answer all questions to get your test result.
1) DNA has what shape?
A
spiral shaped
B
double helix
C
All of these are the shapes of DNA
D
twisted ladder
2) In human reproduction, a baby -
A
Receives 46 chromosomes from both parents
B
Gets half of its chromosomes from the male and half from the female
C
Receives 46 chromosomes from either parent
D
Can inherit only 46 genes
3) The heredity material that controls all cellular activities is called -
A
Cytoplasm
B
ATP
C
DNA
D
Chloroplast
4) In guinea pigs, brown fur (B) is dominant over white fur (b). Figure out the possible outcomes if a purebred brown guinea pig is crossed with a purebred white guinea pig. What percentage of the offspring will have white fur?
A
25%
B
100%
C
0%
D
50%
5) What are the main components of DNA?
A
Nitrogen bases, oxides, sugars
B
Nitrogen bases, sugars, salts
C
Nitrogen bases, sugar, phosphates
D
Nitrogen bases, carbon, sugars
6) Size of lips, dimples, and hair color are all this kind of trait.
A
Learned
B
The same in all of the siblings.
C
Inheritable
7) Cloning uses DNA to make copies of living things.
A
False
B
True
8) TT, tt, DD, dd are all genotypes that are called
A
hybrid, heterozygous
B
purebred, homozygous
C
hybrid, homozygous
D
purebred, heterozygous
9) For the phenotype, A tall head (T) is dominant to short (t), what are the possible genotypes?
A
Tall = TT Short = tt
B
Tall = tt Short = TT, Tt
C
Tall = TT, Tt Short = tt
10) What is an allele whose trait always shows up in an organism when it is present?
A
Dominant
B
Hybrid
C
Purebred
D
Recessive
*select an answer for all questions
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