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Basic Punnett Squares
Test Description: Do one factor crosses using dominant and recessive traits
Instructions: Answer all questions to get your test result.
1) Which of the following would be a GOOD symbol for a recessive allele?
A
G
B
e
C
D
D
o
2) Which of the following would be a GOOD symbol for a dominant allele?
A
h
B
q
C
N
D
S
3) How many genes do you have for one particular trait/protein?
A
1
B
2
C
many
D
4
4) Why do you have two genes for each trait/protein?
A
Because body parts often come in pairs ex. eyes, ears
B
Because you have a male and a female parent
C
Because DNA is double-stranded
D
Because you will have a backup if one fails
5) What is/are the word(s) that describe this symbol: HH?
A
heterozygous dominant
B
heterozygous
C
homozygous recessive
D
homozygous dominant
6) What is/are the word(s) that describe the symbol: Hh?
A
homozygous recessive
B
heterozygous
C
homozygous dominant
D
heterozygous recessive
7) What is/are the word(s) that describe the symbol: hh
A
heterozygous
B
heterozygous dominant
C
homozygous recessive
D
homozygous dominant
8) Homozygous dominant crossed with homozygous dominat. What is the genotypic ratio in their offspring?
A
3:1
B
1:0
C
1:1
D
1:2:1
9) Heterozygous crossed with heterozygous. What is the phenotypic ratios in their offspring?
A
3:1
B
1:1
C
1:0
D
1:2:1
10) What do the letters on the outside of the Punnet square represent
A
Genes that are common in the population
B
Genotypes of the parents
C
Genotypes of the offspring
D
Gametes from the parents
*select an answer for all questions
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