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Punnett Squares Problems
Test Description: Answer the questions correctly to be allowed to play.
Instructions: Answer all questions to get your test result.
1) B=Brown Eyes; b=blue eyes Mom's genotype is Bb and dad's genotype is BB. What are the possible genotypes for the offspring?
A
BB and bb
B
BB only
C
BB and Bb
D
Bb only
2) B=Brown Eyes; b=blue eyes Mom's genotype is Bb and dad's genotype is BB. What are the possible phenotypes for the offspring?
A
Brown eyes
B
Blue eyes
C
Brown and Blue eyes
D
Green eyes
3) Curly hair is recessive, and straight hair is dominant. A woman with curly hair marries a man who is homozygous dominant for straight hair. What are the possible genotypes of their babies?
A
SS only
B
ss only
C
Ss only
D
SS and ss
4) Curly hair is recessive, and straight hair is dominant. A woman with curly hair marries a man who is homozygous dominant for straight hair. What are the possible phenotypes for the children?
A
Straight hair
B
Curly hair
C
Straight and curly hair
D
Wavy hair
5) Black hair is dominant to brown hair. A woman with brown hair marries a man with brown hair. What are the possible genotypes for their kids?
A
BB and bb
B
bb only
C
Bb only
D
Bb and bb
6) Black hair is dominant to brown hair. A woman with brown hair marries a man with brown hair. What are the possible phenotypes for their kids?
A
Brown hair
B
Black hair
C
Grey hair
D
Brown and black hair
7) Attached earlobes (A) are dominant over free hanging earlobes (a). Mom = AA and Dad = aa. What is the probability that the child will have attached earlobes?
A
75%
B
100%
C
25%
D
50%
8) Freckles are recessive. No freckles are dominant. Mom= heterozygous Dad=homozygous recessive Possible genotypes for the kids?
A
Heterozygous only
B
Homozygous dominant only
C
Heterozygous and homozygous recessive
D
Homozygous dominant and homozygous recessive
9) Which of the following have the same phenotype but different genotypes? B=brown, b=blue eyes
A
Homozygous blue eyes and pure-bred brown eyes
B
Heterozygous brown eyes and heterozygous blue eyes
C
Pure-bred brown eyes and homozygous brown eyes
D
Heterozygous brown eyes and homozygous brown eyes
10) Flies can have red eyes, which is Dominant and white eyes, which is Recessive. Which parental cross will give us 75% red-eyed flies and 25% white eyed flies.
A
Rr and rr
B
rr and rr
C
Rr and Rr
D
RR and RR
*select an answer for all questions
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