Hardy-Weinberg. In a species of fish, a single gene controls color. In a population of 100 fish, there are 60 red fish, 30 purple fish, and 10 blue fish. What is the allele frequency of the allele for red color? What is the allele frequency of the blue allele?.
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In a species of fish, a single gene controls color. In a population of 100 fish, there are 60 red fish, 30 purple fish, and 10 blue fish.
What is the allele frequency of the allele for red color?
What is the allele frequency of the blue allele?
There were 2 types of candy you will chose from the bag at random – no peeking or trading!
Consider the following Punnet square, showing a cross between 2 heterozygous individuals for allele A:Remember, P + Q = 1
In the population as a whole, the chance of a new individual receiving an “A” allele is equal to that allele’s frequency in the population, represented as p.
Like any formula with 2 variables, if one is known, the other can be determined.
A more useful way to use the Hardy-Weinberg equation is to convert between phenotype frequencies in a population and allele frequencies in a gene pool.
In the same population of birds, how many of the brown birds are heterozygous for the trait?
So… in our population of 200 birds, 44% are Bb, 10% are bb, and the remainder, 46% should be BB!
If 9% of an African population is born with a severe form of sickle-cell anemia (ss), what percentage of the population will be more resistant to malaria because they are heterozygous(Ss) for the sickle-cell gene?Another example…