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    Biology
    Grade-8
    Easy

    Question

    What is the genotype ratio of the given Punnett diagram?

    1. 1:2:4:2:4:1:2:1:1
    2. 1:2:2:4:1:2:1:2:1
    3. 1:3:3:4:1:2:1:3:1
    4. 1:2:2:4:2:2:1:2:1

    hintHint:

    The genotype depends upon the similarity and difference between the two alleles that make up a gene.

    The correct answer is: 1:2:2:4:1:2:1:2:1

      • Genotype is the genetic make up of the organism
      • Gene is the unit of heredity
      • A gene is made up of two alleles
      • The two alleles can be same (homozygous) or different (heterozygous)
      • The given genotypes are 1AABB, 2AABb, 2AaBB, 4AaBb, 1AAbb, 2Aabb, 1aaBB, 2aaBb and 2aabb for the offspring
      • Hence, the genotype ratio is 1:2:2:4:1:2:1:2:1

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