Biology / Unit 5 Bio 1059 short lesson, about 20 seconds
The Dihybrid Cross
Captions available
The idea
A dihybrid cross tracks two characteristics at once between parents differing at both, revealing whether the two traits assort independently.
In practice
Crossing a plant true-breeding for yellow, round seeds with one true-breeding for green, wrinkled seeds isolates both traits in one cross.
Where people slip
A dihybrid cross requires both parental lines to be true-breeding at both loci — an already-mixed starting genotype breaks the design.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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