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DNA And Genes (Level 2)
Test Description: Seventh grade genetics. Entry level.
Instructions: Answer all questions to get your test result.
1) A section of DNA that codes for a trait or protein.
A
gene
B
base pair
C
chromosome
D
nucleus
2) This structure holds and protects DNA.
A
cell membrane
B
mitochondria
C
ribosome
D
nucleus
3) A DNA structure that carries many organized genes.
A
allele
B
ribosome
C
chromosome
D
cytoplasm
4) A different form of a gene (brown hair vs. red hair).
A
chromosome
B
nucleus
C
genome
D
allele
5) The gene combination for a trait.
A
Base pairing (A = T)
B
chromosomes
C
phenotype (brown hair)
D
genotype (Aa)
6) Which allele is dominant?
A
b
B
T
C
r
D
a
7) Which allele is recessive?
A
A
B
r
C
T
D
B
8) What is a phenotype?
A
Bb
B
T = A or G = C
C
brown eyes
D
all 20,000 genes
9) What allele combination is heterozygous?
A
Bb
B
dd
C
aa
D
rr
10) What allele combination is homozygous recessive?
A
bb
B
R
C
AA
D
Gg
11) What allele combination is homozygous dominant?
A
TT
B
aa
C
g
D
Aa
12) Allele combination = Jj
A
homozygous recessive
B
heterozygous
C
homozygous dominant
13) Allele combination = rr
A
homozygous dominant
B
heterozygous
C
homozygous recessive
14) Allele combination = Ff
A
homozygous dominant
B
heterozygous
C
homozygous recessive
15) All the genetic material to make an organism?
A
base pair
B
genotype
C
genome
D
gene
*select an answer for all questions
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