Khan Academy
Khan Academy: X Linked Inheritance
Find out about the chromosomal basis of sex determination, X and Y chromosomes, and X-linkage.
Khan Academy
Khan Academy: Inheritance of Mitochondrial and Chloroplast Dna
Find out about mitochondrial and chloroplast DNA, and why its inheritance does not follow Mendelian patterns.
Sophia Learning
Sophia: X Linked Traits
This lesson will give examples of disorders that are linked to genes on the X chromosome.
University of Maryland
Univ. Of Maryland Baltimore Cty/biology Century
Historical perspective on Mendel's contribution. Spends a little time setting up what the current beliefs of Mendel's day were and how he changed things with what he did.