[bionet.molbio.genbank] Marriages among cousins.

OLIVER@calstate.bitnet (OLIVER SEELY) (02/03/90)

I searched MELVYL, the University of California card catalog, using
the subject keyword INBREEDING and came up with 24 references at
all libraries.  I eliminated those that I felt were not relevant
to your query about marriage between cousins.  Here are the ones
which might be of interest.

4. Fisher, Ronald Aylmer, Sir, 1890-1962.
     The theory of inbreeding, by Sir Ronald A. Fisher.  2d ed.  New York,
   Academic Press, 1965 [c1949].
       LBL   Donner    S494 .F5 1965
       UCB   BioSci    QH431 .F53 1965
       UCB   BioSci    QH431 .F53 1965 (another copy)
       UCD   HealthSci S494 F56 1965
       UCI   Biomed    S494 .F535t 1965
       UCI   Main Lib  S494 .F56 1965
       UCSB  Library   SF105 .F5 1965 Sci-Engrg
       UCSD  Central   S494 .F56
       UCSF  General   S494  F53t, 1965
       SRLF            A 0003726874 Type EXP SRLF for loan details.
       CSL   Main Lib  S 494 F56 General Coll

7. Galippe, Victor, 1848-1922.
     L'heredite des stigmates de degenerescence et les familles souveraines /
   par le Dr V. Galippe ; preface de M. Henri Bouchot.  Paris : Masson, 1905.
       UCLA  URL       HV 4967 G134h

14. King, Helen Dean, 1869-
      Studies on inbreeding [by] Helen Dean King.  Philadelphia, Pa., The
    Wistar Institute of Anatomy and Biology, 1919.
        UCB   BioSci    QH431 .K57
        UCD   Main Lib  QH431 .K5
        UCLA  Biomed    QH 431 K582s 1919

15. Littlewood, Robert Alden.
      An analysis of inbreeding and effective breeding size in the Tasmanian
    hybrid population of Bass Strait.  [Los Angeles], 1962.
        UCLA  URL       LD 791.9 A6L735
        UCSC  Science   QH470.M52O74
        UCSD  Biomed    QY 60 R6 O693 1978
        UCSF  General   QH470.M52 O74 1978

18. Sanders, Laura Eileen.
      Population extinction : a laboratory study of the long-term effects of
    inbreeding / by Laura Eileen Sanders.  1987.
        UCSD  Biomed    W 4 C153SD S215p 1987
        UCSD  Central   No call number Spec Coll Archives Diss

20. Schull, William J.
      The effects of inbreeding on Japanese children / William J. Schull and
    James V. Neel ; in collaboration with Arthur L. Drew ... [et al.].  New
    York : Harper & Row, c1965.
        UCB   BioSci    HV4995.J3 S3 Shelved at BIOSCIENCES OFF CAMPUS
                        COLLECTION
        UCB   PubHealth HV4995.J3 S3
        UCD   HealthSci HV4995 J3 S3
        UCD   Main Lib  HV4995.J33 I58 1965
        UCLA  Biomed    QZ 50 S386e 1965
        UCLA  URL       HV 4995 J3S38
        UCSB  Library   HV4995.J3 S3
        UCSD  Biomed    QH 431 S386e 1965
        UCSF  General   HV4995.J3 S386e 1965

22. Shine, Ian.
      Serendipity in St. Helena; a genetical and medical study of an isolated
    community. With the assistance of Reynold Gold, and a foreword by Sir Max
    Rosenheim.  [1st ed.].  Oxford, New York, Pergamon Press [1970].
        UCB   PubHealth RA395.S3 S5 1970
        UCD   HealthSci WA900 HA72 S5
        UCI   Biomed    QZ 50 S556s 1970
        UCLA  Biomed    WA 900 HA72 S556s 1970
        UCR   Bio-Ag    RA395.S3 S5 1970
        UCSC  Science   RA395.S3S5
        UCSD  Biomed    WA 900 HA 72 S556s 1970
        UCSF  General   RA395.S3 S5565s 1970
        SRLF            A 0005825146 Type EXP SRLF for loan details.

C0613@umrvmb.bitnet ("Ronald L. Frank") (02/03/90)

We all have a small percentage of mutations which interrupt a few of our
genes and prevent their function.  Being diploid, i.e., two copie of all
genes, the second gene is usually sufficient to provide the necessary
function and the defect is unnoticed throughout life.  With the large
number of genes we have, the likelihood that two individuals randomly
chosen from a population would have a defect in the same gene is
extremely rare. However, we will pass this defective gene to one-half of
our children.  They will be normal because they inherited their second
(normal functioning) gene from our spouse.  Likewise all children
arrying the defective gene unnoticed will pass it to one-half their
children.  Cousins, therefore, have a very high (relative to the general
population, about 1/16) likelihood of carrying the same gene defect.

The result of the defect when it is finally manifested in the children of this
consnguineous marriage can range in severity from totally undetectable to sligh
t inborn errors of metabolism to retardation to severe birth defects to death,
and everything in between.  The defect depends on the function of the gene invo
lved.  Quite often the death symptom can go unnoticed also as spontaneous abort
ion very early in development (before a person knows they're pregnant).

Unfortunately, new and previously undescribed genetic diseases will continue to
 be introduced into the world as long as cousins continue to marry each other.

rlf