Question

21.02 Gregor Mendel has been called the “father of genetics,” having formulated laws of inheritance even before the function of DNA was discovered. In one famous experiment with peas, he crossed pure breeds of plants producing smooth peas and plants producing wrinkled peas. The first-generation peas were all smooth. In the second generation (F2), he obtained 5474 smooth-pea plants and 1850 wrinkled-pea plants. Do these data agree with the conclusion that F2 is made up of 75% dominant trait (in this case “smooth”) and 25% recessive trait (“wrinkled”)?State the null and alternative hypotheses.

12.06 Go back to Exercise 21.2,describing Mendel’s crossing of wrinkled and smooth peas. Software gives a P-value of 0.608. Interpret this result. Can you conclude that the distribution of wrinkled and smooth peas in F2 follows a dominant-recessive model (75%-25%)?

12.10 You want to run a chi-square goodness of fit test on multinomial data from one random sample. Here are the observed and expected counts: Are the conditions met for this test? Explain your answer.

Answer 1