Flower Color in Snapdragons Is Due to a Gene with Incomplete

question 83

Multiple Choice

Flower color in snapdragons is due to a gene with incomplete dominance: C^RC^R plants have red flowers, C^RC^W have pink flowers, and C^WC^W plants have white flowers. What types and ratios of flower color are expected among the progeny of a cross of pink × white?

• A)1 red:2 pink:1 white
• B)1 red:1 pink
• C)1 pink:1 white
• D)all pink
• E)all white

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Definitions:

Random Sequences

Sequences of numbers or events where each member has an equal probability of occurring and the occurrence of each member is independent of the others.

Placebo Effect

A beneficial effect, produced by a placebo drug or treatment, that cannot be attributed to the properties of the placebo itself, and must therefore be due to the patient's belief in that treatment.

Double-Blind Procedures

Experimental procedures in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.

Placebo Effects

The phenomenon in which a person experiences a physical or psychological improvement after receiving a treatment that has no therapeutic value.