Biology 2581B Lecture Notes - Lecture 15: Rna Splicing, Chromatin, Ploidy
23 Apr 2016
School
Department
Course
Professor
Document Summary
Tandem repeats: tandem repeats: most common repeating unit --> one, two, or three base sequences repeated in tandem 15-100 times. The default setting for the organization of ribosomal rna genes and the nuclear genome is: Inside the chromosomes you have genes that encode the large and small ribosome. Usually in tandemly repeats, head to tail units. If you look at the chromosomes you will see 300-400 repeats of the ribosomal rna. By taking the gene and making hundreds of copies of it you are able to translate hundreds of ribosomes a once. Ribosomal rna genes are not on the normal nuclear chromosomes, they are encoded on their own mini chromosomes. The blue is the small subunit rrna and the red is 14 fragmented pieces of the large subunits. Instead of having repeats, there are hundreds of copies of the mini chromosomes.
