Phenotypic Ratio Calculator

Formula

The formula to calculate the Phenotypic Ratio is:

\[ PHR = \frac{F1}{FS} \]

Where:

\( PHR \) is the phenotypic ratio
\( F1 \) is the frequency of the first phenotype
\( FS \) is the frequency of the smallest phenotype

What is a Phenotypic Ratio?

The phenotypic ratio is a ratio that shows the relative number of offspring manifesting a particular trait or combination of traits. It is commonly used in genetics to predict the outcomes of a cross or breeding experiment.

Example Calculation

Let's assume the following values:

Frequency of the First Phenotype (F1) = 9
Frequency of the Smallest Phenotype (FS) = 3

Using the formula:

\[ PHR = \frac{9}{3} = 3 \]

The Phenotypic Ratio is 3.