Because of penetrance, not everyone who has the for a trait will express that trait.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

What terms describes being out of water after being submerged

Which heredity condition causes a buildup of mucus in lungs and pancreas? a. cystic fibrosis b. heart disease c. huntington's disease d. sickle cell anemia