PROBLEM #1

Free earlobes are a dominant trait caused by the allele combinations EE and Ee. On the other hand, attached earlobes are a recessive trait caused by the combination ee. Two parents with free earlobes both have the allele combination Ee. If each parent gives one of its alleles to their children,

(1) what is the probability that they will have a child with the same allele combination Ee?

(2) What is the probability that they will have a child with free earlobes?

(3) What is the probability that they will have a child with attached earlobes?

PROB 2

A normally distributed population of lemming body weights has a mean of 63.5 g and a standard deviation of 12.2 g. What is the estimated probability of encountering a lemming weighing 78.0 g?

(1) Using the information on lemming body weights above, which of the following values may likely be encountered about 34% of the time?