In the Section "Investigating Life: Does Natural Selection Maintain Cystic

question 56

Multiple Choice

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," if two carriers of the defective CFTR gene have a child,what is the probability that the child will have cystic fibrosis?

• A)75%
• B)50%
• C)100%
• D)0%
• E)25%

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Definitions:

Transform Boundary

A type of tectonic plate boundary where two plates slide past each other horizontally.

Seafloor Spreading

The process by which new oceanic crust is formed at mid-ocean ridges and slowly moves away from the ridge, contributing to continental drift.

Continental Drift

The theory that Earth's continents have moved over geologic time relative to each other, thus appearing to drift across the ocean bed.

Mid-Atlantic Ridge

A continuous underwater mountain range in the Atlantic Ocean, formed by tectonic plate divergence.