Some Chickens Have a Dominant Frizzle Gene That Leads to the Development

question 31

Multiple Choice

Some chickens have a dominant frizzle gene that leads to the development of feathers that curl outward rather than lying flat against their bodies as in standard chickens. Aside from these "frizzled feathers," chickens with this dominant allele also tend to have higher metabolic rates and produce fewer eggs than chickens that carry the recessive version of this gene. Thus, this gene exhibits __________.

• A) pleiotropy
• B) polygenic inheritance
• C) incomplete dominance
• D) codominance

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Definitions:

Alveolus

A small air sac within the lungs where the exchange of oxygen and carbon dioxide takes place during respiration.

Pulmonary Capillary

A small, thin-walled blood vessel located in the lungs where gas exchange between the blood and alveoli occurs.

Oxygen Diffusion

The movement of oxygen molecules from areas of high concentration to areas of low concentration, essential for respiratory processes in cells.

Bicarbonate Ions

Anions resulting from the dissociation of carbonic acid, playing a significant role in maintaining the body's pH balance.