STATE OF MICHIGAN

GEORGE ROMNEY
Governor |

 

LAFAYETTE CLINIC

951 E, LAFAYETTE
DETROIT 7, MICHIGAN

June 17, 1965

Joshua Lederberg

Professor of Genetics

Stanford University School of Medicine
Stanford Medical Center

300 Pasteur Drive

Palo Alto, California

Dear Dr. Lederberg:

I appreciated your letter very much and am enclosing the five reprints
which you requested. No, I do not minimize the importance of genetic
components. I hope that sorting out and accounting for some of the en-
vironmental factors will prove of value in clarifying the action of
genetic effects. We have proceeded with the twin study and now with
additional cases have been analyzing the sub-tests with the Wechsler

IQ. We have also been collecting encephalographic data on the twin

sets along with EEG of siblings of the twins or their parents. Part

of the work is being done with the Cat. We have been finding a difference
between the breech-born and vertex-born twin, another non-genetic factor
which at the moment, however, remains somewhat unclear.

I will be happy to send you copies of the papers when they are prepared.

Very truly yours, 7)

An theaet cl

/ John A. Churchill, M.D.
° Chief, Child Neurology

JAC/gk
Enc.

Mico
4
4

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