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Correspondence between Pontecorvo and Dr Giuseppe (Gio or "Joe") Bertani discussing their research into crossing over and exchanges between alleles

Pontecorvo mentions that his general working hypothesis is that "sister chromatid crossing-over is a necessary part of the process of chromosome reproduction". He also discusses Robert ("Bob") Pritchard's discovery of "multiple exhanges between alleles".

Papers of Guido Pellegrino Arrigo Pontecorvo, geneticist, Professor of Genetics, University of Glasgow, Scotland

Papers of Guido Pellegrino Arrigo Pontecorvo, genetics research correspondence

Research correspondence marked  'Glasgow: current research (up to 1960)'

Correspondence between Pontecorvo and Professor Boris Ephrussi concerning genetics research and other matters

Correspondence between Pontecorvo and Dr Eva R Sansome concerning their research on fungi, including Aspergillus and possible PhD research

Letters sent to Pontecorvo from John L Yuill asking for samples of Pontecorovo's Penicillium notatum and Aspergillus oryzae cultures and their x-ray mutants

Bundle of correspondence between Pontecorvo and Dr Kenneth B Raper concerning studies into mutations of moulds such as Aspergillus

Correspondence between Pontecorvo and Professor Tracy Morton Sonneborn concerning research on linkage relations of genes involved in successive steps of biochemical synthesis and homo/hetherothallism

Correspondence between Pontecorvo and Dr P W Brian concerning research into anti-fungal antibiotics produced by aerobic spore-forming bacteria and related papers

Two letters to Pontecorvo from Professor Luigi Luca Cavalli-Sforza concerning 'aerobacter aerogenes mutants' and 'incomplete tetrads'

Correspondence between Pontecorvo and Professor Lionel Sharples Penrose concerning Pontecorvo's "Aspergillus mutant"

Two letters sent to Pontecorvo from Professor Charlotte ("Lotte") Auerbach sharing her thoughts on his work with the fungi Aspergillus

Correspondence between Pontecorvo and Dr David Mahlon Bonner concerning research relating to Pontecorvo's "Aspergillus mutants"

Correspondence between Pontecorvo and Dr Sol Speigelman concerning Speigelman's interest in engaging with yeast genetics and Pontecorvo's developments with Aspergillus nidulans

Correspondence between Pontecorvo and Kenneth Mather in which Mather asks Pontecorvo for advice on choosing a fungi for his colleagues to experiment on and suggests his colleagues receive training in Pontecorvo's laboratory

Correspondence between Pontecorvo and Professor Luigi Luca Cavalli-Sforza discussing arrangements for a genetics meeting in Copenhagen

Correspondence between Pontecorvo and Dr Gertrude Lindgren concerning Lindgren's request for a sample of Pontecorvo's mutant bakers yeast to expermiment on

Copy of a letter from Pontecorvo to Professor Hermann Joseph Muller asking for his comments and opinion on two of his two typescript draft papers and giving an update of Dr Joseph Alan Roper's work

Letter to Pontecorvo from Professor Charlotte ("Lotte") Auerbach thanking him for sending Dr Joseph Alan Roper's paper on biotin synthesis and commenting on the results and a copy of a letter from Professor Hermann Joseph Muller

Correspondence between Pontecorvo and Professor Hans Adolf Krebs concerning Pontecorvo's research on mutants of Aspergillus nidulans

Correspondence between Pontecorvo and Professor Charles Leonard Huskins concerning Pontecorvo and Dr Joseph Alan Roper's research into diploids in Aspergillus nidulans and somatic recombination

Letter to Pontecorvo from M M Green concerning Dr Joseph Alan Roper's experiments with the bi genes in diploid nuclei and its similarity with Green's work on Drosophila

Letter to Pontecorvo from Joshua Lederberg discussing Pontecorvo's paper given recently in Bristol [on diploids and Aspergillus]

Bundle of correspondence between Pontecorvo and Mr N Xeros concerning Pontecorvo's comments and opinion of Xeros' paper on "Lysenko's theories" on genetics titled  'The scientific case for Lysenko'

Correspondence between Pontecorvo and Dr Sterling Howard Emerson discussing Pontecorvo's plan to produce heterozygous diploids in Neurosporan with Dr Joseph Alan Roper and the difficulties in achieving this

Letter to Pontecorvo from José Luis Reissig concerning Reissig's work on Neurospora mutants and threonine metabolism on Neurospora

Correspondence between Pontecorvo and Professor Kenneth Mather concerning Pontecorvo's interest in Mather's work on somatic recombination in Penicillium and the two patents relating to Pontecorvo's work on somatic recombination in Aspergillus nidulans

Correspondence between Pontecorvo and Professor Joshua Lederberg concerning Dr Joseph Alan Roper's Rockefeller fellowship and 1 year trip to the United States

Letter to Pontecorvo from Dr John M Rendel discussing the nature of the gene and crosssing over between alleles

Bundle of correspondence between Pontecorvo and Dr M N green concerning their work on crossing over between alleles and Pontecorvo's experiments using Aspergillus and Drosophila

Bundle of correspondence between Pontecorvo, Professor F S Spring and J M Hartog concerning research on oxidation of steroids and Pontecorvo's work on Aspergillus niger

Copy of a letter from Pontecorvo to Professor John Burdon Sanderson ("Jack") Haldane commenting on Haldane's draft paper

Letter to Pontecorvo to from Giussepe Montalenti

Correspondence between Pontecorvo and Professor John T Patterson concerning Patterson's research on the evolution in the genus of Drosophila

Correspondence between Pontecorvo and Professor R Matthey concerning his comments on Pontecorvo's paper on grisens, one of his only "incursions into cytology"

Correspondence between Pontecorvo and Professor John Burdon Sanderson ("Jack") Haldane concerning Haldane's response to Pontecorvo's request from him to write something about sexual reproduction

Correspondence between Pontecorvo and Professor Cyril Dean Darlington about the part in Darlington's book titled The facts of life where he refers to an unknown soldier of World War I and his ideas on "scientific Calvinism" (said to be influenced by one of Bateson's lectures on Mendelism)

Correspondence between Pontecorvo and Werner Braun about Pontecorvo's research on bacterial recombination

Bundle of correspondence between Pontecorvo and Professor Linsday S Olive commenting on Pontecorvo's recent paper on Aspergillus and Olive's interest to learn more about relative heterothallism

Bundle of correspondence between Pontecorvo and Dr John M Rendel concerning Pontecorvo's work on crossing over between multiple alleles in Aspergillus and a discussion of pseudo-allelism

Correspondence between Pontecorvo and Professor Philip MacDonald Sheppard discussing Pontecorvo's reprints and research on the nature of the white eye locus in Drosophila and his studies into crossing over between alleles

Correspondence between Pontecorvo and Max Ludwig Henning Delbrück discussing Pontecorvo's studies into crossong over within chromosomes and Delbrück's work on the replication of DNA

Correspondence between Pontecorvo and Dr Robert Russell Race concerning Race's draft typescript of an addendum to the second edition of his book, and a draft letter for Natureon Rh blood group genes

Bundle of correspondence between Pontecorvo and Dr Giuseppe Sermonti regarding their research and Sermonti's paper in Streptomyces

Copy of a letter from Pontecorvo to Dr Eva R Sansome regarding her paper on Neurospora and research on Penicillium and Pontecorvo's "present main interest"; the process of mitotic crossing over

Bundle of correspondence between Pontecorvo, Dr Dan Lewis and Dr Robert Russell Race concerning Dr Lewis's work on mutations in genes controlling pollen antigens and Pontecorvo's research on allelism

Correspondence between Pontecorvo and Professor Alexandre Quintanilha concerning Quintanilha's comments on Pontecorvo's paper on the genetics of Aspergillus and his discovery of the formation of diploid nuclea by fusion of haploid ones

Bundle of correspondence between Pontecorvo and Dr Kenneth Alexander Bisset concerning a disagreement about the work and motto ("Courage and Imagination") of bacterial cytologists

Bundle of correspondence between Pontecorvo and Dr Ernest F Gale and Dr T W Walker in which Walker asks Pontecorovo to examine a strain of Aspergillus nidulans for a research project on the production of fat by microorganisms

Bundle of correspondence between Pontecorvo and E W Buxton concerning Buxton's research into heterokaryosis and results of recent experiments

Bundle of correspondence between Pontecorvo and Dr Giuseppe Sermonti conerning Pontecorvo's corrections on Sermonti's paper on Streptomyces for Nature

Bundle of correspondence between Pontecorvo and Professor Cyril Dean Darlington, Dr Joseph Grafton Gall, and Professor Harold Garnet ("Mick") Callan concerning Pontecorvo's decision to write up his "wild speculations about crossing over" and his request for Callan and Galls's contributions from the angle of lampbrush chromosome

Correspondence between Pontecorvo and John R Raper concerning Raper's request for Pontecorvo to provide him with strains of Aspergillus nidulans for a demonstration of somatic recombination and diploidization

Bundle of correspondence between Pontecorvo and Professor Donald Devereux Woods concerning Woods's request for cultures of B6 mutants of Penicillium and Aspergillus to use for experiments on the biosynthesis of vitamin B6

Correspondence between Pontecorvo and Professor Francis Harry Compton Crick concerning the time taken for DNA replication

Correspondence between Pontecorvo and Dr Giuseppe (Gio or "Joe") Bertani discussing their research into crossing over and exchanges between alleles

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