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 ...

Medically reviewed by Danielle Weiss, MD Most cases of immunoglobulin A (IgA) nephropathy are sporadic (or idiopathic), occurring over time for reasons experts don't fully understand.Research suggests ...