The topic # 27. Calvin Blackman Bridges.

I need in years of life and reference (see below) for this description:

1914   Calvin Blackman Bridges (YYYY-YYYY ?) reports nondisjunction of sex chromosomes as a proof of the chromosome theory of heredity.

1919   Calvin Blackman Bridges (YYYY-YYYY ?) (reference ?) discovers chromosomal duplications in Drosophila.

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