Researchers cross a corn plant that is pure-breeding for the dominant traits colored aleurone (C1), full kernel (Sh), and waxy endosperm (Wx) to a pure-breeding plant wiht the reccessive trains colorless aleurone (c1), shrunken kernal (sh), and starchy (wx). The resulting F1 plants were crossed to pure-breeding colorless, shrunken, starchy plants. Counting the kernals from about 30 eats of corn yields the following data: Kernel Phenotype Colored, shrunken, starchy Colored, full, starchy Colored, full, waxy Colored, shrunken, waxy Colorless, shrunken, starchy Colorless, full, starchy Colorless, full, waxy Colorless, shrunken, waxy Number 116 601 2538 4 2708 2 113 626 6708
a) Why are these data consistent with genetic linkage among the three genes?
b) Perform a chi-square test to determine if these data show significant deviation from the expected phenotype distribution.
c) What is the order of these genes in corn?
d) calculate the recombination fraction between the gene pairs.
e) what is the interference value for this data set?