058-300 Autismo e Genetica parte 6 (volume terzo)

Uploaded by RotoloGiuseppe on 01.01.2011

We see another article in the Medline on the relationship between genetics and autism.
The families know more and more the influence of genetics in autism and pervasive developmental disorders.
Autism, pervasive developmental disorders and developmental disorders or development are the heaviest and most frequent pediatric emergency that parents face.
Is emerging increasingly from parents, especially if informed, the need for consulting services.
This interest is greater in families where there is already a component with a developmental disorder of the development of any kind.
Unfortunately, the genes that influence autism and pervasive disorders are many and complex modes of inheritance have.
Knowledge about autism and genetics are growing each year and are currently insufficient to have a definitive vision.
The Medical School of London has drawn up this article, however, relates to protocols to offer advice to families.
The genotype is the set of genes within the set of chromosomes.
What relationship is there between genotype and environment?
What is the phenotype? What is the actual physical manifestation of genes?
What influence the environment? The environment is involved in gene expression?
Parents need information about the risks of recurrence. How likely are my gene can damage my child?
Environment in which the gene is more harmful? These questions should answer a pre-pregnancy advice. In trying to answer these questions in part the article said
The pairs of nitrogenous bases make up DNA, portions of DNA form genes, groups of genes form chromosomes
Humans possess 23 pairs of chromosomes. DNA has four kinds of nitrogen bases (nucleotides)
All information passed from DNA are formed by four basis points, adenine, thymine, cytosine, guanine
From the video we can see a stretch of a DNA molecule. The DNA molecule consists of two nucleotide chains, oriented in the opposite direction
So one of the two chains have the message of the code, the other chain is complementary to and does not carry the genetic information to be transferred immediately
The nitrogen bases (nucleotides) attached to the structure (double helix) will join the center as the rungs of a spiral staircase
The adenine bases are coupled with the bases thymine, guanine bases mate with the base cytosine
The sequence of these four nitrogen bases or nucleotides that carries the genes
An alteration in the correct sequence can influence diseases such as autism