I can show the facts here.
Human:
total length: about 3,000,000,000
coding genes: about 50,000 (included predicted ones)
3,000,000,000/50,000=60,000
Chromosome number: 23
Zebrafish:
total length: about 1,400,000,000
coding genes: about 36,000 (included predicted ones)
1,400,000,000/36,000=38,889
Chromosome number: 25
Fruitfly:
total length: about 1,400,000,000
coding genes: about 19,000 (included predicted ones)
1,400,000,000/19,000=73,684
Chromosome number: 4
Saccharomyces cerevisiae:
total length: about 12,000,000
coding genes: about 7,000 (included predicted ones)
12,000,000/7,000=1,714
Chromosome number: 16
http://useast.ensembl.org/Homo_sapiens/Info/Annotation
http://useast.ensembl.org/Danio_rerio/Info/Annotation
http://useast.ensembl.org/Drosophila_melanogaster/Info/Annotation
http://useast.ensembl.org/Saccharomyces_cerevisiae/Info/Annotation