4.1 – Chromosomes, Genes, Alleles, and Mutations Topic 4 – Genetics 4.1 – Chromosomes, Genes, Alleles, and Mutations

http://learn.genetics.utah.edu/content/begin/tour/

Component Explanation 6 The chromosome number. p The position is on the chromosome's short arm (p for petit in French); q indicates the long arm (chosen as next letter in alphabet after p). 21.3 The numbers that follow the letter represent the position on the arm: region 2, band 1, sub-band 3. The bands are visible under a microscope when the chromosome is suitably stained. Each of the bands is numbered, beginning with 1 for the band nearest the centromere. Sub-bands and sub-sub-bands are visible at higher resolution. The numbers that come after the p or q are not something you would have to try to figure out since we do not have scopes that can view gene’s bands. However, this is good information to know.

What is a Genome? A Genome is the whole of the genetic information of an organism. When you get the chance, look up the human genome project. Either Google it or try You Tube. Here’s the link to the one from class: http://www.youtube.com/watch?v=F5LzKupeHtw