People with the sickle cell trait, but not sickle cell disease, find natural protection against malaria. Scholars consider various combinations of genotypes and environmental factors to determine if children might have sickle cell...

Fourth graders explore their ancestral background while they experience genealogy.

Students examine Canadian census data from 1981 and 2001 to investigate how the family structure has changed. They investigate important aspects of family life.

[Free Registration/Login Required] Use the chart and the key shown and drag the "symptom markers" to correctly illustrate which individuals are directly affected by the disease illustrated in the chart. You will need a sign-in to access...