Hardy-Weinberg Principle and Allele Frequencies

This video explores the concept of allele frequency, using a simplified model of eye color to explain dominant and recessive alleles. It demonstrates how to calculate allele frequencies in a small population and distinguishes between phenotype and allele frequency. The video concludes with an introduction to the Hardy-Weinberg principle, setting the stage for further exploration of genetic equilibrium.

What is an allele?

• A variant of a gene

• A chromosome

• A type of cell

• A type of protein

In the simplified eye color model, which allele is dominant?

• Neither is dominant

• Both are equally dominant

• Capital B for brown

• Lowercase b for blue

How many people are in the artificially small population used to explain allele frequency?

• Three

• Two

• Four

• One

What is the frequency of the brown allele in the example population?

• 0.75 or 75%

• 1.00 or 100%

• 0.25 or 25%

• 0.50 or 50%

What percentage of the population exhibits brown eyes in the phenotype frequency example?

• 100%

• 75%

• 50%

• 25%

How does allele frequency differ from phenotype frequency?

• Allele frequency considers individual alleles, while phenotype frequency considers visible traits.

• Allele frequency is always higher than phenotype frequency.

• Phenotype frequency considers individual alleles, while allele frequency considers visible traits.

• They are the same.

What does the letter 'p' represent in the Hardy-Weinberg principle?

• Frequency of the dominant allele

• Frequency of the recessive allele

• Total population size

• Number of alleles

What is the sum of p and q in the Hardy-Weinberg principle?

• 1.0

• 0.5

• 2.0

• 0.75

What does the letter 'q' represent in the Hardy-Weinberg principle?

• Total number of alleles

• Population size

• Frequency of the dominant allele

• Frequency of the recessive allele

What is the main assumption made about the alleles in the population for the Hardy-Weinberg principle?

• There are multiple alleles for each trait.

• There are only two alleles for each trait.

• Alleles are not inherited from parents.

• Alleles do not affect phenotype.