Dominant autosomal diseases

A monogenic disease has a dominant autosomal hereditary transmission when the gene involved is located on one of the autosomes and the pathological conditions occurs when one of gene copies is altered (dominant trait); examples of the dominant autosomal diseases are familial hypercholesterolemia, polycystic kidney, neurofibromatosis, Huntington’s chorea disease. Generally individuals affected have one sick and one healthy parents.
In fig. 1 for a specific gene the normal allele is point out with a, that changed with A; for example a sick mother heterozygous Aa has both normal and mutated allele and she produces oocytes with a normal allele a or the mutated allele A; health father produces the spermatozoa with normal allele a. They can generate:
• With the probability of 50%, children with no one of mutated alleles (homozygous individual aa), so they not transmit the mutated allele, because they
have normal gene copies.
• With the probability of 50% affected children with a normal and one mutated gene (heterozygous individual Aa) so they have a probability of 50% to transmit to their children the mutated allele.
Both male and female individuals can show autosomal dominant diseases.

Trasmissione ereditaria di una malattia genetica autosomica dominante

Fig.1- Dominant autosomal hereditary transmission

Questo sito usa i cookie per migliorare la tua navigazione. Se vuoi saperne di più o negare il consenso a tutti o ad alcuni cookie clicca qui. Chiudendo questo banner acconsenti all’uso dei cookie. To find out more about the cookies we use and how to delete them, see our privacy policy.

  I accept cookies from this site.
EU Cookie Directive plugin by www.channeldigital.co.uk