Crossing-Over Is the Only Factor That Is Responsible for the Variation

question 2

True/False

Crossing-over is the only factor that is responsible for the variation that exists between offspring of one set of parents.

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Definitions:

Marfan Syndrome

Autosomal dominant genetic disorder of the connective tissue, specifically the fibrillin protein.

Sickle Cell Disease

A genetic disorder resulting in red blood cells assuming an abnormal, rigid, sickle shape, leading to various complications including pain and anemia.

Red Blood Cells

Bioconcave cells that carry oxygen throughout the body, using the protein hemoglobin, and are essential for delivering oxygen to tissues.

Nature

The phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth, as opposed to humans or human creations.