BIOLOGY 1A03 Chapter Notes - Chapter 5.1: Aria, Autosome, Phenotype

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Rosa Da Silva

Document Summary

The variety of different sequences across the genome results in genetic variation of the organism: not all variations will have an observed effect, ex: if the variation is present in a non-protein coding region. The severity of the effects of variations vary: some can even be beneficial. Single nucleotide or number of tandem repeats differ in a given population of individuals. Detecting snps: 99. 9% of human dna sequences are the same, genetic variation is the differences we see amongst individuals. Snps (single nucleotide polymorphisms): most common type of genetic variation: caused by single base changes or substitution, found throughout the genome, can be found in coding and non-coding regions, most are found in non-coding regions. If they are found close to a particular gene they can be used as a dna marker for that gene. If the snps is close enough to the gene it could get passed on along with the gene.