When are oxygen-producing cyanobacteria known

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Q1. X-linked Recessive: colour-blindness, malepatterned baldness, hemophilia Color-blindness is caused by a recessive gene (b) on X chromosome. Predict phenotypes for children of a female carrier with a normal male. A genetic wasteland?

Q2. When are oxygen-producing cyanobacteria known, with certainty, to have been present on the scene?

Reference no: EM137330

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