Allele Frequencies and Phenotypes in Rock Pocket Mice

The video tutorial explores the concept of allele frequencies in rock pocket mice, focusing on calculating the frequencies of dominant and recessive alleles (P and Q) using the Hardy-Weinberg principle. It provides step-by-step solutions to example problems, demonstrating how to determine the frequency of heterozygous genotypes and calculate allele frequencies in different population scenarios. The tutorial emphasizes understanding the relationship between phenotypes and genotypes, and how to apply mathematical formulas to solve genetic problems.

What are the two phenotypes of rock pocket mice discussed in the video?

• Striped and spotted fur

• Large and small ears

• Dark and light fur

• Short and long tails

In a population of 100 rock pocket mice, 81 have light fur. What is the frequency of the recessive allele (Q)?

• 0.1

• 0.9

• 0.5

• 0.2

What percentage of the population is heterozygous if P is 0.1 and Q is 0.9?

• 9%

• 1%

• 81%

• 18%

In a population of 16 rock pocket mice, 4 have light fur. What is the value of Q?

• 0.75

• 0.1

• 0.5

• 0.25

If the frequency of P in a population is 0.6, what is the frequency of Q?

• 0.6

• 0.4

• 0.8

• 0.2

In a population of 1,000 rock pocket mice, 640 have light fur. What is the frequency of the recessive allele (Q)?

• 0.6

• 0.8

• 0.4

• 0.2

What percentage of the population is homozygous dominant if P is 0.2?

• 40%

• 4%

• 20%

• 16%

What is the total percentage of the population that is either homozygous dominant or heterozygous if 360 mice have dark fur?

• 36%

• 64%

• 46%

• 54%

If 64% of a population has light fur, what is the value of Q squared?

• 0.36

• 0.64

• 0.16

• 0.04

What is the relationship between P and Q in a population at Hardy-Weinberg equilibrium?

• P + Q = 1

• P + Q = 2

• P - Q = 1

• P * Q = 1