General interest questions

Jacob BROSTOFF jayjay at cs.mcgill.ca
Thu Feb 17 13:35:19 EST 1994


Someone asked about genome sizes ... from my intro genetics notes:
                  DNA length / cell              est. no of genes
Lambda phage           17 microns                   50-60
T4 phage 	       70                           200	
E Coli                 1 000                        3000
Drosophila             1 600                        approx 50 000
Homo Sapiens           1.74 metres                  apporx 200 000

BUT!

Necturus ('mud puppy') has 17.5 times longer DNA / cell than homo sapiens,
trilliums have 18.5 times more, and Amphiuma ('congo eel') have 26 times
more (approx 130 feet)	

so usually, it gets bigger as you go up the evolutionary ladder, but not 
always.

j



More information about the Bioforum mailing list