Punnett Squares Problems Question Preview (ID: 37147)


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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 and bb
c) Bb only
d) BB only

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 and Blue eyes
b) Brown eyes
c) Blue eyes
d) Green eyes

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 and ss
d) ss only

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

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 only
b) BB and bb
c) bb only
d) Bb and bb

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) Brown and black hair
d) Grey hair

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) 25%
b) 50%
c) 75%
d) 100%

Freckles are recessive. No freckles are dominant. Mom= heterozygous Dad=homozygous recessive Possible genotypes for the kids?
a) Heterozygous only
b) Homozygous dominant and homozygous recessive
c) Heterozygous and homozygous recessive
d) Homozygous dominant only

Which of the following have the same phenotype but different genotypes? B=brown, b=blue eyes
a) Pure-bred brown eyes and homozygous brown eyes
b) Homozygous blue eyes and pure-bred brown eyes
c) Heterozygous brown eyes and homozygous brown eyes
d) Heterozygous brown eyes and heterozygous blue eyes

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

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