You cross a round-seeded pea plant that is heterozygous for the allele controlli

Question

You cross a round-seeded pea plant that is heterozygous for the allele controlling seed shape (Rr) with a true-breeding wrinkled pea plant (r). There are 73 round and 127 wrinkled offspring. The null hypothesis is that the cross conforms to the expected ratio of an Rr x rr cross with one dominant (R) and one recessive (r) allele. Do you reject or fail to reject the null hypothesis? Assume a significance cut-off of p 0.05. O O O Cannot determine based on the data provided. Reject. Fail to reject.

Explanation / Answer

Answer: Reject.

Explanation: When an heterozygous pea plant (Rr) is crossed with homozygous recessive trait plant (rr), we expect the cross ratio to be 1:1 . But in this experiment we have obtained 73 round and 127 wrinkled offspring. So, here the cross ratio is 1:2 . And moreover if the p-value is less than 0.05, then the null hypothesis is rejected.

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.