Lab 6
–
Hardy-Weinberg and Kuru

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*
What’s up with allele frequencies??
1. How can O+ be the most common of the blood
types if it is the expression of a recessive allele?
2. Since Huntington’s disease comes from a
dominant allele, shouldn’t three quarters of the
population be affected?
3. Shouldn’t recessive lethal alleles gradually
disappear from populations?

Allele Frequencies
Allele frequency in a two-allele system:
p
= the proportion of one allele
q
= the proportion of the other allele
p
+
q
= 1

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*
Let’s say
p
is the proportion of r+ (orange fur) alleles in the
Fraggle population and
q
is the proportion of r (green fur) alleles
in the Fraggle population.
Let’s also say that p = ½ and q = ½.
1.) What’s the probability of a Fraggle having TWO r+ alleles?
3.) What’s the probability of a Fraggle having ONE r+ allele
and ONE r allele?
2.) What’s the probability of a Fraggle having TWO r alleles?
[Read as: “The probability of having an r+ allele is 1/2,
and the probability of having an r allele is 1/2.”]