The Chi-Square Test Can Be Used to Test Genetics Hypotheses

question 22

Short Answer

The chi-square test can be used to test genetics hypotheses. For example, it can be used to test the hypothesis that a trait is recessive, in which case two heterozygous parents would be expected to yield 25% homozygous offspring expressing the trait. Large deviations from the expected 25% may indicate the hypothesis is incorrect.
The chi-square equation is as follows:
chi-square = [total of (observed-expected)²] / expected
A cross between two heterozygous tall plants resulted in 136 tall offspring and 36 short offspring. Calculate the chi square value. Give your answer to 2 decimal places.

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