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What is the probability that a seed from the F1 generation of a RrYy × RrYy cross is round and yellow?

medium 3 marks Class 12 · Biology · Principles of Inheritance and Variation
Answer
9/16

The correct answer is 9/16 — Joint probability = .

Step-by-step solution

  1. Each parent contributes an allele for seed shape: probability of (round) = 0.5.
  2. Probability of round phenotype = .
  3. Similarly for seed colour: probability of yellow = .
  4. Joint probability = .
Common mistake: Multiplying probabilities of homozygous genotypes instead of phenotypes

Concept tested: Independent assortment probability calculation

Published · How this solution was prepared and checked

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