Biology / Unit 6 Bio 1183 short lesson, about 20 seconds
Morgan's Drosophila Evidence for the Chromosomal Theory
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The idea
Thomas Hunt Morgan confirmed the chromosomal theory in 1910 by tracing a Drosophila eye-color trait's inheritance to the X chromosome specifically.
In practice
Morgan's white-eye trait passed exactly as an X-linked factor would, never as an autosomal one.
Where people slip
Morgan's result ties one named trait to one named chromosome — it is not itself proof every trait works this way.
Your place on the trail
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