When Mendel Crossed Yellow-Seeded and Green-Seeded Pea Plants, All the Offspring

question 45

Multiple Choice

When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow seeded. When he took these F1 yellow-seeded plants and crossed them to green-seeded plants, what genotypic ratio was expected?

• A) 1:2:1
• B) 3:1
• C) 9:3:3:1
• D) 1:1
• E) 1:1:1:1

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Definitions:

Operant Conditioning

A learning method where the consequences of a behavior influence the likelihood of that behavior occurring again.

Organisms Learn

The process by which living organisms acquire new behaviors or modify existing ones through experience and interaction with the environment.

Fixed-Ratio

A schedule of reinforcement where a response is reinforced only after a specified number of responses, often used in behavior modification.

Schedule of Reinforcement

The strategy or plan for timing and frequency of reinforcement to establish or maintain a behavior in operant conditioning.