A mutation in the ras cellular oncogene can cause cancer when it
is in the heterozygous...
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A mutation in the ras cellular oncogene can cause cancer when itis in the heterozygous condition, but a mutation in the RB tumorsuppressor gene can cause cancer only when it is in the homozygouscondition. What does this difference between dominant and recessivemutations imply about the roles that the ras and RB gene productsplay in normal cellular activities?
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Membraneassociated G proteins Ras protein are encoded by the ras gene are involved in activating the signalling cascade and key nuclear genes to regulate the cell cycle The ras gene is mutated in many cancers Point mutations in the coding region or in the controlling
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