This population consists of 75 brown animals, 38 with genotype BB and 37 with Bb

Question

This population consists of 75 brown animals, 38 with genotype BB and 37 with Bb, and 25 tan animals with genotype bb.

Questions:

What are the allele frequencies of this population? (In other words, how many copies of the B allele are there, how many copies of the b allele are there, and what percentage of the total does each form?) Hint: Count Big “B” and Little “b”. Totals should add up to 200. Divide each by 200 to get percentage. Ignore circle for now.

Copies of B allele Percentage of total (200)= ___________________

Copies of b allele Percentage of total = ___________________

Explanation / Answer

This population consists of 75 brown animals, 38 with genotype BB and 37 with Bb, and 25 tan animals with genotype bb.

Questions: What are the allele frequencies of this population?

Anwer:

The total number of animals counted is 75 + 25 = 100

The frequency of bb = q2 = 25/100=0.25

Therefore, q (the square root of q2) is 0.5

Since q equals the frequency of the b allele, then the frequency is 50%.

Since q = 0.5, and p + q = 1, then p = 0.5; the frequency of B is equal to p, so the answer is 50%.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.