Practice question

MCQ

Question

Mayfair genes (HYPOTHETICAL) consist of a superfamily of transcription factors. They are found in 4 clusters in mammals; in 2 clusters in insects; andin a single cluster in an ancestor to insects. These data consistent with all of the following explanations EXCEPT:

Options

Choose one · Correct answer highlighted

Two successive genome duplication event occurred between ancestral organisms and vertebrates the first duplication may have taken place before divergence of vertebrates exon shuffling exclusively produced such cluster Correct whole genome duplication could lead to such observation.

Explanation

mayfair genes (hypothetical) consist of a superfamily operates via exon shuffling exclusively produced such cluster represents established outcome. functional assays validates option C. Other options propose substrate or regulatory direction, inconsistent with published kinetics and mutant phenotypes.

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