Lesson: Chapter 20 — Heredity

20.2. Mendel's experiments 4 of 7 Reset answers

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Question 4

The F₁ plants from that cross are allowed to self-pollinate. In what ratio do tall and dwarf plants appear in the F₂?

A 1 tall : 3 dwarf B 1 tall : 1 dwarf C 2 tall : 1 dwarf D 3 tall : 1 dwarf

The right answer is the one marked above.

3 tall : 1 dwarf. Mendel counted thousands of F₂ plants and got this ratio for stem height — and for all six of the other characters he studied.

Seven characters giving the same ratio is what turns a result about peas into a rule about inheritance.

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