Multiple choice

How many types of gametes are produced by plant having genotype RrYy?

  1. 2

  2. 4

  3. 6

  4. 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A plant with genotype RrYy has two heterozygous gene pairs. Following Mendel's law of independent assortment, it produces 2^2 = 4 types of gametes: RY, Ry, rY, and ry. Each allele combination is equally likely. This is a classic dihybrid cross result.

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