Mendelian One and Two Locus Example

Inspect the Data, Decide on the Underlying Ratio, and Click

The counts of each of the phenotypes will exhibit random variation, and so the exact ratio expected may not be exhibited. However it will be possible to distinguish between the different ratios. The phenotypes may, or may not, be presented in the common ordering, e.g. a 3:1 ratio may be presented as 1:3.

The purpose of this exercise is to gain facility in recognizing the one and two locus ratios. If you think you recognize the ratio, choose that answer and check it. If you are uncertain, it will help to reduce the observations to decimal fractions of the total.

                            Observations

Phenotype I		Phenotype II		Phenotype III		Phenotype IV

Select the ratio by clicking on the button

Check your choice:           Result