Punnett Square Practice - Homework
1. One parent organism has brown eyes (BB), while the other has red eyes (bb). What is
the probability that an offspring will have red eyes?
2. One parent organism has black fur (Bb), while the other has white fur (bb). What is
the probability that an offspring will have black fur?
3. Both parent organisms have brown eyes (Bb). What is the probability that an
offspring will have brown eyes?
4. Both parent organisms have white fur (bb). What is the probability that an offspring
will have white fur?
5. One parent organism has red flowers (Rr), while the other has white flowers (rr).
What is the probability that an offspring will have white flowers?
6. Both parent organisms have red flowers (Rr). What is the probability that an offspring
will have white flowers?
Punnett Square Practice - Homework
1. One parent organism has brown eyes (BB), while the other has red eyes (bb). What is
the probability that an offspring will have red eyes?
2. One parent organism has black fur (Bb), while the other has white fur (bb). What is
the probability that an offspring will have black fur?
3. Both parent organisms have brown eyes (Bb). What is the probability that an
offspring will have brown eyes?
4. Both parent organisms have white fur (bb). What is the probability that an offspring
will have white fur?
5. One parent organism has red flowers (Rr), while the other has white flowers (rr).
What is the probability that an offspring will have white flowers?
6. Both parent organisms have red flowers (Rr). What is the probability that an offspring
will have white flowers?
Punnett Square Quiz *** Show your work ON YOUR PAPER!
13. One cat carries hybrid, long-haired traits (Ss), and its mate carries
purebred short-haired traits (ss). Use a Punnett square to determine the
probability of one of their offspring having long hair.
Genotype
Phenotype
14. One flower is hybrid red (Rr) and it is crossed with a purebred white (rr)
plant. Use a Punnett square to determine the probability of one of their
offspring having a red color.
Genotype
Phenotype
15. The common grackle is a species of robin-sized blackbirds that are fairly
common over most of the United States. Suppose that long tails (L) were
dominant to short tails (l) in these birds. A female short-tailed grackle (ll) mates
with a male long-tailed grackle (Ll). What is the probability of a short-tailed
grackle being born?
Genotype
Phenotype
16. In dogs, wire hair (S) is dominant to smooth (s). In a cross of a homozygous
wire-haired dog with a homozygous smooth-haired dog, what will be the
phenotype of the offspring?
Genotype
Phenotype