Multiple choice

Dihybrid Test Cross ratio is:

  1. 1:1:1:1

  2. 1:1

  3. 9:3:3:1

  4. 12:3:1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dihybrid test cross (AaBb x aabb) gives 1:1:1:1 ratio. Each heterozygous gene produces 1:1 in test cross, and genes assort independently. 9:3:3:1 is dihybrid F1xF1 ratio, 1:1 is monohybrid test cross.

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