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 ...

Scientists have long known that the DNA code in genes is not the only way to pass genetic traits from parents to offspring. "Epigenetic" marks—chemical modifications to DNA that don't change the DNA ...

All people have two copies of every gene – one copy inherited from each parent. The NF1 gene mutation is dominant, which means that only one of the two copies of the gene needs to have the mutation to ...

Neurofibromatosis type 2 is caused by a change in the NF2 gene located on chromosome 22. This gene encodes a protein known as merlin. Mutations in the NF2 gene disrupt the function of merlin, which is ...

Adrenoleukodystrophy is a rare condition associated with abnormalities in myelin, the white matter that protects nerve fibers in the spinal cord and brain. It occurs due to a mutation on the X ...