A)    In Drosophila (fruit flies) ebony body color and being eyeless are both autosomal recessive traits. An ebony fly is mated with an eyeless fly and the F₁ are all wild type.

The F₂ are:         

                        590 wild type

185 eyeless

200 ebony

72 eyeless and ebony

Test the hypothesis that this was a dihybrid cross (ratios) using the Chi Square test.

B)     A corn plant with purple, full kernels is crossed with a plant having purple, full kernels. The following progeny are obtained:

Purple, full                       100

Purple, shrunken              36

Yellow, full                       30

Yellow, shrunken              8

Determine the genotypes of the parents and progeny.

Test your hypothesis with a Chi square test until it is accepted.

NEED

1. -Chi square,
2. -degrees of freedom
3. -probability
4. -accept/reject