When Two or More Genes Influence a Trait,an Allele of One

question 4

Multiple Choice

When two or more genes influence a trait,an allele of one of them may have an overriding effect on the phenotype.When an allele has such an overriding effect,it is said to be:

• A) Dominant
• B) Recessive
• C) Penetrant
• D) Epistatic
• E) Expressive

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Definitions:

Blood Pressure

The force exerted by circulating blood on the walls of blood vessels, often measured for diagnosing and monitoring various health conditions.

Venules

Small vessels that carry blood from capillaries to veins, being part of the return segment of the circulatory system.

Nutrient Exchange

The process by which nutrients are transferred between organisms and their environment.

Capillary Beds

Capillary beds are networks of capillaries where the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues occurs.