Question

2.
In sweet pea plants, the trait for purple flowers (P) is dominant to the trait for red flowers (p)
Similarly, the trait for long pollen (L) is dominant to the trait for round pollen (l)
Two heterozygotes are crossed, yielding the following frequencies for the F1 generation:
293 purple long plants;
19 purple, round plants
26 red, long plants
83 red, round plants
Use the chi-square test to determine if these results are due to independent assortment.
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Answer 1

Answer:

Scientists performed an experiment with pea plants, set up much the same way as Mendel's pea plant genetic experiments. The scientists studies two traits simultaneously, flower color (purple or red) and pollen shape (long or round). They started with true breeding purple and long plants and crossed them with true breeding red/round plants. The resulting F1 plants all demonstrated purple flowers and long pollen. The F1 plants were the crossed with each other. The expected and observed results are shown here. What relevant question is appropriate to ask next based on conclusions drawn from the observed data?

what the answer

Explanation:

Answer 2

Chi-Square test

Explanation:

• It is the test to prove the consistency of the null hypothesis or, in simple words, if the observed data is similar to expected data or not.
• We will determine the value of X² ( chi-square) as  X² = ∑ (O-E)²/E
• If the value is large enough, that simply suggests that the difference between observed data and expected data is noticeable. The data is inconsistent with the null hypothesis.
• For the given data the value of X² ( chi-square) is determined as shown below and we infer that the given data is not following the null hypothesis and thus, the result is not due to independent assortment.