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Handbuch der Vererbungswissenschaft

Nature volume 135, page 250 (16 February 1935) | Download Citation



THE physical basis of crossing-over is now A one of the major problems in genetics. Its solution will require a more detailed correlation of genetical results with the behaviour of the pairing threads in meiosis than has yet been made. The very extensive genetical facts already accumulated, and set forth at length in the book before us, call for a cytological explanation; but it is safe to say that all the theories hitherto put forward are defective either in supporting observations or in interpretation or in both. Yet it appears that the problem has now reached a point where it can only be solved by the cytologists, with such further aid as genetics can give.

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