Some genes are passed on from parent to offspring without ever being part of a nuclear chromosome. Where are these genes found, and how does this non-nuclear inheritance occur? But why is leaf color ...

What can Gregor Mendel’s pea plants tell us about human disease? Single gene disorders, like Huntington’s disease and cystic fibrosis, actually follow Mendelian inheritance patterns. The ...

In Mendelian inheritance patterns, you receive one version of a gene, called an allele, from each parent. These alleles can be dominant or recessive. Non-Mendelian genetics don’t completely follow ...