Biology 1001A Lecture Notes - Noncoding Dna, Ploidy, Intron
19 Nov 2012
School
Department
Course
Professor
Document Summary
C-value : the amount of dna in one genome (haploid cell) Genome size doesn"t dictate size of organism. Haploid (n): cell has one set of chromosomes. Diploid (2n): cell has two sets of chromosomes. One c-value is distributed over one set of chromosomes. E. g. , 3n cell has 3 copies of its (unreplicated) genome and has a c value of 3c. Proportion of the human genome that code for protein. 10%: essential; 2% of this is for coding. Non-nuclear genomes in typical plant and animal cells. Nuclear genome: complete dna sequence in one set of all your chromosomes. Trend in c value (prokaryotic vs. eukaryotic cells) Genome size is variable within a taxonomic group. In general, prokaryotic have smaller c values relative to eukaryotic cells. Linear chromosomes are (almost) only found in eukarya. A chromosome is packed chromatin (dna plus proteins) Each chromatid is one molecule of dsdna (double-stranded dna)
