___ allows scientists to transfer genes for one organism to another

___ is a tool for tracing a genetic trait through generations of a family.

Examples of chemical ___ includes asbestos and chemicals found in cigarette smoke.

If a mutation occurs in the DNA of ___ cells, it can be passed from one generation to the next.

If a change occurs in a base sequence of a DNA, it might cause a different ___ to be substituted in a protein.

Sickle cell anemia is a disease that affects red blood cells. This is the result of a mutation called a ___.

One effect of the ___ that is responsible for sickle cell disease is that sickled cells are not as good as normal cells at carrying oxygen through the body.

A disease that occurs when a child inherits a defective gene from parents who do not suffer from the disease in a ___ disorder.

In a pedigree, a solid square or circle indicates that the person ___.

In a pedigree, a half filled square or circle indicates that the person ___.

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