To determine the frequency of the [tex]\( BB \)[/tex] genotype in a horse population, we need to follow these steps:
1. Calculate the Total Number of Individuals:
First, find the total number of individuals in the population by adding the number of individuals for each genotype.
[tex]\[
\text{Total individuals} = \text{Number of } BB + \text{Number of } Bb + \text{Number of } bb
\][/tex]
Given data:
[tex]\[
\text{Number of } BB = 35
\][/tex]
[tex]\[
\text{Number of } Bb = 40
\][/tex]
[tex]\[
\text{Number of } bb = 25
\][/tex]
[tex]\[
\text{Total individuals} = 35 + 40 + 25 = 100
\][/tex]
2. Determine the Number of [tex]\( BB \)[/tex] Genotype Individuals:
From the given data, the number of individuals with the [tex]\( BB \)[/tex] genotype is 35.
3. Calculate the Frequency of the [tex]\( BB \)[/tex] Genotype:
The frequency of a specific genotype is found by dividing the number of individuals with that genotype by the total number of individuals in the population.
[tex]\[
\text{Frequency of } BB = \frac{\text{Number of } BB}{\text{Total individuals}}
\][/tex]
Substituting the values we have:
[tex]\[
\text{Frequency of } BB = \frac{35}{100} = 0.35
\][/tex]
Therefore, the frequency of the [tex]\( BB \)[/tex] genotype is [tex]\( \boxed{0.35} \)[/tex].
The correct answer is:
B. 0.35
