Get an in-depth look at gene inheritance and transmission with this webpage. This site explores genetics beyond Mendel and his peas. Investigate transmission genetics with the following topics gene linkage, variation in gene expression,...

The structure of families in medieval and modern times, and the patterns they follow are examined. These include topics such as household composition, age of marriage, life expectancy, inheritance customs, financial resources, disruptive...

An interactive Punnett Square inheritance calculator helps students work out patterns of recessive inheritance for a trait, such as straight or peaked hairline.

Find out about mitochondrial and chloroplast DNA, and why its inheritance does not follow Mendelian patterns.

[Free Registration/Login may be required to access all resource tools.] Take a close look at non-traditional theories stemming from Mendel's genetics research. Explore the details of complex inheritance patterns.

Find out about the chromosomal basis of sex determination, X and Y chromosomes, and X-linkage.

The entire text of Charles Darwin's book, The Origin of Species is available on this site. This link is specifically for the chapter that discusses embryology as evidence for evolution.

Travel deep into the human body to see exactly where your DNA resides. From the NOVA: Cracking the Code of Life Web site.

Through a series of videos and narrated animations, learn how evolution affects gene expression in species. Find out how visualizing gene expression can help explain what a specific gene does.

[Free Registration/Login may be required to access all resource tools.] A pedigree is a chart that shows the inheritance of a trait over several generations. A pedigree is commonly created for families, and it outlines the inheritance...

Concise description of embryology as evidence for evolution, as used by Darwin.