๐”– Bobbio Scriptorium
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On Parthenogenesis in Spiders

โœ Scribed by Thos. H. Montgomery, Jr.

Book ID
123965723
Publisher
Marine Biological Laboratory
Year
1907
Tongue
English
Weight
140 KB
Volume
13
Category
Article
ISSN
0006-3185

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Brevipalpus obovatus Donnadieu is a thelytokous species having two chromosomes in soma and germ line. G-banding pattern and internal differences during anaphase indicate that the two chromosomes are nonhomologous and that females are haploid with n = 2. The same number applies for the males of the s

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## i c h i g m Earlier study has shown that all agents which cause artificial parthenogenesis in the sea-urchin egg produce a coagulation in the cytoplasm (Heilbrunn, '15). This does not mean that all types of coagulative change cause the egg to begin its development, for, as is fairly obvious, so