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 ...

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 ...

Multifactorial diseases, such as coronary artery disease, can be as complex as their name suggests. How much can we hope to understand about diseases with such variation in inheritance? Aa Aa Aa ...