14. In guinea pigs, short hair, S, is dominant to long hair, S. Complete the following Punnett squares according to
the directions given. Then, fill in the blanks beside each Punnett square with the correct numbers.
Ss
a. One guinea pig is Ss and one is ss.
Expected number of offspring:
SISS/SS
2 Short hair (SS or Ss)
2 Long hair (ss)
S 85155
S S
b. Both guinea pigs are heterozygous for short hair.
Expected number of offspring:
55.15
Short hair
I Long hair
S $555
Part C: Monohybrid Cross Problems - - Make a punnett square to show your work.
15. Hornless (H) in cattle is dominant over horned (h). A homozygous hornless bull is mated with a homozygous
horned cow. What will be the genotype and phenotype of the offspring?
H 17
Genotype 100%
h 10th/1th
Phenotype Homless
h Itn Tom
16. In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous for red fruit is crossed
with a plant that has yellow fruit. What will be the genotype and phenotype of the offspring?
R 1 B
Genotype 100%
Rr Rr
Phenotype
Red plant
r Rr Rr
17. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller RR
marries woman who is heterozygous for tongue rolling.
Father's a phenotype NO Mother's phenotype Yes
V RrRV
Father's genotype of this couple having a child who is a tongue roller? 50%
If Mother's genotype Rr
RV/RJ
What is the probability
18. Brown eyes in humans are dominant to blue eyes. A brown-eyed man, whose mother was blue-eyed,
What marries is the brown-eyed probability that this couple will have a blue-eyed child? 25.10
a woman whose father had blue eyes.
Answer the following questions by completing the punnett square.
F
