What Type of Evidence Suggests the Genetic Basis of Traits

question 19

Multiple Choice

What type of evidence suggests the genetic basis of traits like cleft lip?

• A) Concordance for monozygotic twins is much greater than for dizygotic twins.
• B) Environment significantly affects such traits.
• C) Genes predispose individuals to express the trait.
• D) Risk increases as genetic relationships become more distant.
• E) Some kind of threshold must be reached before trait can be expressed.

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Definitions:

Piston Slap

A condition where there is excessive lateral movement of the piston within its cylinder, leading to a knocking noise.

Head Gasket

A critical sealing component located between the engine block and cylinder head in an internal combustion engine, preventing leakage of coolant or oil into the cylinders.

White Exhaust Smoke

Emission indicative of coolant entering the combustion chamber, often due to a blown head gasket or cracked engine block.

Detonation

An uncontrolled, explosive ignition of fuel within an engine's cylinder after the spark plug has fired, often causing engine damage.