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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
base pair
B
gene
C
nucleus
D
chromosome
2) This structure holds and protects DNA.
A
cell membrane
B
nucleus
C
ribosome
D
mitochondria
3) A DNA structure that carries many organized genes.
A
ribosome
B
allele
C
chromosome
D
cytoplasm
4) A different form of a gene (brown hair vs. red hair).
A
genome
B
chromosome
C
nucleus
D
allele
5) The gene combination for a trait.
A
chromosomes
B
genotype (Aa)
C
Base pairing (A = T)
D
phenotype (brown hair)
6) Which allele is dominant?
A
T
B
r
C
a
D
b
7) Which allele is recessive?
A
B
B
r
C
A
D
T
8) What is a phenotype?
A
T = A or G = C
B
all 20,000 genes
C
Bb
D
brown eyes
9) What allele combination is heterozygous?
A
rr
B
Bb
C
dd
D
aa
10) What allele combination is homozygous recessive?
A
Gg
B
bb
C
AA
D
R
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
homozygous recessive
C
heterozygous
14) Allele combination = Ff
A
homozygous dominant
B
heterozygous
C
homozygous recessive
15) All the genetic material to make an organism?
A
genome
B
base pair
C
genotype
D
gene
*select an answer for all questions
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