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Punnett Squares Quiz
Test Description: Study!
Instructions: Answer all questions to get your test result.
1) How many alleles control a Mendelian trait, such as pea seed color?
A
4
B
1
C
2
D
3
2) A plant species has two alleles for flower color: Red (R) and White (r). The Red (R) allele exhibits complete dominance. If a heterozygous red flower and a white flower are crossed, what is the chance that they will have a white flowered offspring?
A
75%
B
50%
C
0%
D
25%
3) A plant species has two alleles for flower color: Red (R) and White (r). The Red (R) allele exhibits complete dominance. If a purebred red flower is crossed with a white flower, what is the chance that the offspring will be red?
A
50%
B
100%
C
75%
D
0%
4) A plant species has two alleles for leaf shape: Curly (C) and flat (c). The Curly (C) allele exhibits complete dominance. If a heterozygous curly plant is crossed with a homozygous curly plant, what percentage of their offspring will be homozygous?
A
50%
B
0%
C
25%
D
75%
5) Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a hybrid offspring in the cross: BB x Bb.
A
0%
B
25%
C
50%
D
75%
6) Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a homozygous offspring in a cross: BB x BB.
A
100%
B
25%
C
75%
D
50%
7) Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a black offspring in a cross: bb x bb.
A
0%
B
25%
C
50%
D
75%
8) Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a white offspring in a cross between two heterozygous guinea pigs.
A
25%
B
75%
C
0%
D
100%
9) Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of an offspring with the same phenotype as its parents in a cross between a homozygous black and a heterozygous black guinea pig.
A
75%
B
0%
C
50%
D
100%
10) What is the difference between genotype and phenotype?
A
A phenotype is one parent's traits and the genotype is both parents' traits together.
B
A phenotype is HOW the traits are inherited from the parents and a genotype is the versions of the traits inherited (alleles)
C
A phenotype is the alleles involved (EE, Ee, or ee) and the genotype is how the trait appears or is expressed
D
A phenotype is how the traits are expressed or appear and the genotype is the alleles involved (EE, Ee, or ee)
*select an answer for all questions
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