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Punnett Square Practice
Test Description: Monohybrid crosses
Instructions: Answer all questions to get your test result.
1) In pea plants, purple is dominant to white flowers. What is the genotype of a purebred purple plant (homozygous dominant)?
A
PP
B
pp
C
Ww
D
Pp
2) In pea plants, purple is dominant to white flowers. What is the genotype of a hybrid purple (heterozygous) plant?
A
Ww
B
Pp
C
pp
D
PP
3) In pea plants, purple is dominant to white flowers. What is the genotype of a purebred white flowered plant (homozygous recessive)?
A
Ww
B
pp
C
PP
D
Pp
4) If two heterozygous pea plants were crossed what percent likely is the dominant phenotype (purple)?
A
75%
B
25%
C
50%
D
100%
5) If a heterozygous purple pea plant is crossed with a homozygous recessive white pea plant, what percent of their offspring will be heterozygous?
A
25%
B
75%
C
100%
D
50%
6) Using a punnett square predict the likelihood of two humans having a male. Remember, XX is the genotype of the female and XY is the genotype of the male.
A
50%
B
25%
C
75%
D
100%
7) Cuteness is a dominant trait in bunnies. If two heterozygous cute bunnies had numerous offspring, what % of their offspring is likely to not be cute? Remember cuteness is the phenotype not the genotype.
A
75%
B
100%
C
50%
D
25%
8) Fluffy fur is a dominant trait in guinea pigs. If two fluffy guinea pigs have a non-fluffy baby, what must the parent genotypes have been?
A
ff and ff
B
Ff and Ff
C
FF and FF
D
FF and ff
9) Having 6 or more fingers per hand is a dominant but rare trait. What is the percent likely they will have a 6 fingered child?
A
75%
B
25%
C
50%
D
100%
10) If a hybrid (heterozygous) purple flowered plant is crossed with a white (homozygous recessive) pea plant, what is the percent likely that the offspring will have white flowers?
A
50%
B
100%
C
25%
D
75%
*select an answer for all questions
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