## Related questions with answers

Students carried out a pea plant experiment, where two heterozygous individuals were crossed. The predicted Mendelian ratios for the offspring were 9 : 3 : 3 : 1 for each of the four following phenotypes: round-yellow seed, round-green seed, wrinkled-yellow seed, wrinkled-green seed. The observed results were as follows: Round-yellow seed: 441, wrinkled-yellow seed: 143, Round-green seed: 159, Wrinkled-green seed: 57 Use a separate piece of paper to complete the following: (a) State the null and alternative hypotheses (

$H_o \text{and} H_A$

). (b) Calculate the

$\chi^ { 2 }$

value. (c) Calculate the degrees of freedom and state the P value corresponding to your calculated

$\chi^ { 2}$

value. (d) State whether or not you reject your null hypothesis: reject

$H_o$

/ do not reject Ho (circle one)

Solution

Verifieda) H0: There is no significant difference between the predicted ratios and the observed ratios of the offspring of two heterozygous pea plants.

HA: There is a significant difference between the predicted ratios and the observed ratios of the offspring of two heterozygous pea plants.

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