A segment of DNA that codes for a trait is called

A structure that contains genes- humans have 23 pairs

What percent of your DNA do you get from your mom?

Used to predict genetic crosses

Represents an organisms inherited traits- Usually written as two letters

Physical expression of a gene-Example eye color

Traits that are displayed only when two of the traits are present.

Traits that are always displayed no matter what the other allele is

A change in the genetic code of an organism and can be caused by radiation and chemicals

Neither allele is dominant so the traits tend to blend

Both genes show in the phenotype

Traits that are not inherited, but do affect the phenotype

Organisms with traits that are well suited for their environment survive and pass on their genes to offspring. What is this called?

If two bears that are heterogeneous for black fur (B) have cubs, what are the chances the cubs will be black?

Which system removes waste from the body?

The body's ability to regulate its internal environment.

Which body system exchanges gases with the outside environment?

Which body system breaks down food for nutrients?

Which body system responds to stimuli?

Which body system circulates waste, nutrients, and gases all over the body?

Which two systems work together to get oxygen to the cells?

What are the levels of organization in the human body from smallest to largest?

The heart and blood vessels are in which system?

The respiratory system contains the

Which system contains the brain and nerves?

What are the organs of the excretory system?

Which system contains muscles and bones?

Which system contains the stomach, esophagus, small and large intestines?