Biology / Unit 5 Bio 1063 short lesson, about 20 seconds
The Forked-Line Method
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The idea
The forked-line method diagrams a multi-trait cross by branching each trait's probability separately, then multiplying across branches, avoiding an unwieldy full Punnett square.
In practice
A trihybrid cross's forked-line diagram branches first by seed color, then by seed shape, then by plant height, multiplying probabilities along each path.
Where people slip
The forked-line method assumes independent assortment at every branch — linked loci break its multiplication step.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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