Using the data in Fig. 24.1, human=20,300genes/3384Mb=6.0 genes/Mb, which is close to chimpanzees at 6.3 genes/Mb and mice at 6.5 genes/Mb. Rice has 39,045genes/373Mb=105 genes/Mb, which is closest to fruit flies at 98 genes/Mb.
Work Step by Step
Just divide as shown to get these numbers. Please note that the numbers in Fig. 24.1 disagree with those in the calculated answer in the textbook.