2. Mendel's Laws of Inheritance
Monohybrid Cross
2:04 minutes
Problem 39a
Textbook Question
Textbook QuestionA cross between a spicy variety of Capsicum annum pepper and a sweet (nonspicy) variety produces progeny plants that all have spicy peppers. The are crossed, and among the plants are 56 that produce spicy peppers and 20 that produce sweet peppers. Dr. Ara B. Dopsis, an expert on pepper plants, discovers a gene he designates Pun1 that he believes is responsible for spicy versus sweet flavor of peppers. Dr. Dopsis proposes that a dominant allele P produces spicy peppers and that a recessive mutant allele p results in sweet peppers.
Assuming the proposal is correct, what proportion of the spicy F₂ pepper plants do you expect will be pure-breeding? Explain your answer.
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