ConceptsB

Eukaryotic genes may be regulated through the control of mRNA processing. The selection of alternative splice sites leads to the production of different proteins.

tra pre-mRNA 5'

lj In males, the

Alternative 3' splice sites A B C

Intron

Intron

In females, the presence of Sxl protein.

mRNA 5'

lj In males, the

Intron

Intron

In females, the presence of Sxl protein.

mRNA 5'

No functional Tra protein is produced

Male phenotype

No functional Tra protein is produced

Male phenotype

Female phenotype

Female phenotype

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