Questions:

Question 1:
Dominate allele for tall plants = D
· Recessive allele for dwarf plants = d
· Dominate allele for purple flowers = W
· Recessive allele for white flowers = w
· Cross a homozygous dominate parent with a homozygous recessive parent

a. What is the probability of producing tall plants with
purple flowers? Possible genotype(s)?
b. What is the probability of producing dwarf plants
with white flowers? Possible genotype(s)?
c. What is the probability of producing tall plants with
white flowers? Possible genotype(s)?
d. What is the probability of producing dwarf plants
with purple flowers? Possible genotype(s)?

Question 2: Set up a punnett square using the following
information:
· Dominate allele for black fur in guinea pigs = B
· Recessive allele for white fur in guinea pigs =b
· Dominate allele for rough fur in guinea pigs = R
· Recessive allele for smooth fur in guinea pigs = r
· Cross a heterozygous parent (BbRr) with a heterozygous parent (BbRr)

a. What is the probability of producing guinea
pigs with black, rough fur? Possible genotype(s)?
b. What is the probability of producing guinea
pigs with black, smooth fur?
Possible genotype(s)?
c. What is the probability of producing guinea
pigs with white, rough fur?
Possible genotype(s)?
d. What is the probability of producing guinea
pigs with white, smooth fur?
Possible genotype(s)?

Question 3: Suppose a white, straight haired guinea pig mates with a brown, curly-haired animal. All five babies in
their first litter have brown fur, but three are curly and two have straight hair. The second litter consists of
six more brown offspring, where two are curly and four are straight haired.

a. Assuming curly is dominant to straight, what are the genotypes of the parents and the offspring?

b. What is the probability of getting two female guinea pigs with straight hair in a row?