T. Trimpe 2008 http://sciencespot.net/
1. Predict the offspring from a cross between a purebred pea plant with purple
flowers and a pea plant with white flowers. Use P for purple and p for white.
(a) Give the genotypes.
Purebred Purple = ____
White = ____
(b) Create a Punnett square to determine the genotypes for the offspring.
(c) What is the probability that a plant would have purple flowers? _______ %
(d) What is the probability that a plant would have white flowers? _______ %
2. If you crossed two hybrid plants with purple flowers and planted 200 of the
seeds, how many would you expect to have with white flowers. Create a
Punnett square to support your answer.
1. Predict the offspring from a cross between a purebred pea plant with purple
flowers and a pea plant with white flowers. Use P for purple and p for white.
(a) Give the genotypes.
PP
Purebred Purple = ____
pp
White = ____
(b) Create a Punnett square to determine the genotypes for the offspring.
p
p
P
Pp
Pp
P
Pp
Pp
(c) What is the probability that a plant would have purple flowers? 100%
(d) What is the probability that a plant would have white flowers?
0%
2. If you crossed two hybrid plants with purple flowers and planted 200 of the
seeds, how many would you expect to have with white flowers. Create a
Punnett square to support your answer.
P
P
p
p
PP Pp
Pp
pp
You would expect to see white flowers
on 25% of the plants, which would be
50 plants.