Autosome is a chromosome that is not a sex chromosome, and when ZRS cic element of PD gene was not in proportion to the mother or father cat carrying a certain variant of a gene that is because the gene had either an incomplete or
reduced penetrance.
Significant pleiotropy and
reduced penetrance were characteristic of MYH7 mutation - positive congenital heart malformations.
Marlinde L. van den Boogaard conduct analyses suggesting transcription of DUX4 in somatic cells is modified by variations in its epigenetic state and provide a basis for understanding
the reduced penetrance of Facioscapulohumeral dystrophy (FSHD) within families.