Lesson: Chapter 20 — Heredity

20.2. Inheritance and chance 1 of 4 Reset answers

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Question 1

Four seeds are collected from a Tt × Tt cross and sown. Must exactly one of the four plants be dwarf?

A No, because the ratio applies only to the F₁ B Yes, but only if all four seeds germinate C No — each seed is a separate chance, so all four could be tall D Yes — the 3 : 1 ratio guarantees it

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No — each seed is a separate chance, so all four could be tall. One in four is a probability, not a guarantee about any particular four seeds.

The ratio describes what happens over large numbers. Mendel counted thousands of plants for exactly this reason.

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