INTRODUCTION
The topic # 8. August Friedrich Leopold Weismann (1834-1914).
I need in the references (see
below) for these descriptions:
1883
August Friedrich Leopold Weismann (1834-1914) points out the distinction
in animals between the somatic cell line and the germ cells, stressing
that only changes in germ cells are transmitted to further generations.
This German biologist disproved Lamarck's notion of "the inheritance of
acquired characteristics." He is primarily remembered as the scientist
who cut off the tails of 901 young white mice in 19 successive
generations, yet each new generation was born with a full-length tail.
The final generation, he reported, had tails as long as those originally
measured on the first. For further Weismann's bibliography see
Fäßler
(1996).
1884-1888 Identification of the cell nucleus as the basis for
inheritance was independently reported by Wilhelm August Oskar Hertwig
(1849-1922) (Hertwig, 1894), the brother of Richard Karl Wilhelm Theodor
von Hertwig (1850-1937), Eduard Adolf Strasburger (1844-1912) (Strasburger,
1884, 1907), Rudolph Albert von Kolliker (1817-1905) (reference
?), and August Friedrich Leopold Weismann
(1834-1914) (Weismann, 1892).
1887 Edouard van Beneden (1846-1910) (reference
?) demonstrated chromosome reduction in
gamete maturation, thereby confirming August Weismann's (1834-1914)
predictions (Weismann, 1883). He also discovered that all organisms of
the same species have the same number of chromosomes.
1887 August Friedrich Leopold Weismann (1834-1914) (reference
?) elaborated an all-encompassing theory of
chromosome behavior during cell division and fertilization and predicted
the occurrence of a reduction division (meiosis) in all sexual
organisms.
1888 Theodor Boveri (1862-1915) (reference
?) verifies August Weismann's (1834-1914)
predictions (Weismann, 1883) of chromosome reduction by direct
observation in Ascaris.
1892 August Friedrich Leopold Weismann (1834-1914)
formulated the germ plasm theory which held that the germ plasm was
separate from the somatoplasm and was continuous from generation to
generation. The germ plasm theory is one of the most important
contributions to evolutionary theory since Darwin's Origin of Species.
Weismann disproved the John George Adami's (1862-1926) theory (Adami and
Roy, 1892; Adami, 1901) of the heritability of certain metabolic
disorders. Contrary to Weismann's theory of the non-inheritability of
acquired traits, Adami believed that many exogenic intoxications and
acquired disturbances of metabolism had a changing effect on the germ
cells and were thus heritable. Probably, Adami's point of view
stimulated occurrence of the mutation theory.
References
* Weismann A, 1883. Ueber die Vererberung.
Publisher???
* Weismann A, 1887. Reference
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* Weismann A, 1892. Das Keimplasma. Eine Theorie der Vererbung.
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