How Many Phenotypic Classes May Be Generated from a Three-Point

question 12

Multiple Choice

How many phenotypic classes may be generated from a three-point testcross?

• A) (3)2 = 9
• B) (3)3 = 27
• C) (2)2 = 4
• D) (2)3 = 8
• E) It cannot be predicted.

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Definitions:

Posterior Air SACs

Posterior air sacs are part of a bird's respiratory system, acting as reservoirs for fresh air, allowing for efficient gas exchange.

Fresh Air

Air that is outdoor, unpolluted, and considered healthy to breathe, characterized by its cleanliness and freshness.

Inhalation

The act of drawing air or other substances into the lungs.

Exhalation

The process of breathing out, expelling air rich in carbon dioxide from the lungs to the outside environment.