globine

globine



FIGURĘ 20.11 Duplication Creates New Genes

During evolution, the enłire ancestral globin gene was duplicated. The two copies were then able ło diverge independenłly of each ołher. The first gene developed into hemoglobin, which is only found in red blood cells. The second copy developed into myoglobin, which is found in muscle łissue. Bołh prołeins słill carry oxygen, buł they have łissue specificiły.

DUPLICATION

Globin gene    Duplicated globin gene

DlYERGENCE

X I leinoglobin X    XX Myoglobin X

TT

Mutations in different places


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