Problem Set 1- Due in class Friday 9/11/99
1. Use the Punnett Square method to calculate the F2 PHENOTYPIC ratios
of the following pea plant cross:
Tall, wrinkled-pea plant x dwarf, round-pea plant
T=tall allele
t=dwarf allele
R=round allele
r=wrinkled allele
2. Calculate the F2 GENOTYPIC ratios for the above cross using the
branch diagram method.
3. What is the probability of getting a tail when you flip a fair coin?
4. What is the probability of getting two tails when you flip 2 fair
coins (or flip one coin twice)?
5. What is the probability of getting two heads OR two tails when you
flip 2 fair coins?
6. What is the probability that a couple with three children will have 2 sons
and one daughter (in any order)? Reword this question using either AND or
OR (whichever is more appropriate) if you are having trouble figuring out
how to answer it.
7. What is the probability that a couple that has 6 daughters already will
have a son for the seventh child?
8. What is the probability that a couple that wants to have seven children
will have seven daughters?
9. Use the Punnett Square method to calculate the probability of
obtaining an individual with the genotype AAbb from parents with the
genotypes AaBb x Aabb?
10. Use probability theory to calculate the probability of obtaining an
individual with the genotype aaBBccDdEe from parents with the
genotypes AaBbCcDDee x aaBbCcddEE.
11. Use probability theory to calculate the probability of obtaining an
individual with the phenotype A-B-ccD-E- from parents with the genotypes
AAbbCCDdEe x aaBbccDdee?