[Campbell Biology P.339] Which of Mendel's laws explains the 3:1 ratio of phenotypes seen in... | Practice Question

Which of Mendel's laws explains the 3:1 ratio of phenotypes seen in a monohybrid cross e.g., F2 generation of purple and white flowers ?

  • A: The law of independent assortment
  • B: The law of segregation
  • C: The law of dominance
  • D: The multiplication rule

Explanation

The summary for Concept 14.1 explicitly states that the law of segregation 'explains the 3:1 ratio of F2 phenotypes observed when monohybrids cross.' This law dictates that the two alleles for a heritable character separate from each other during gamete formation and end up in different gametes.