A behavior an individual abstains from defines a

The tendency of offspring to move away from the area in which they were born:

A custom is a must behavior.

The nuclear family is the largest possible family unit.

No frills – No fuss

Social customs which may be broken without serious consequence

The Brady Bunch is an example of a blended family.

BRCA1 and BRCA2 are genes that encode for proteins that suppress the growth of tumors. Mutations in BRCA1 and BRCA2 have been mainly linked to an increased risk of which of the following cancers:

What first raised the awareness of researchers and medical professionals to the existence of a new disease that would later be known as HIV?

This lung disease often afflicts individuals with AIDS, but is uncommon in healthy individuals with healthy immune systems: