 | Zoology - 1907 - 506 pages
...BRANDES (1898) und BUGNION (1906). — Hierfür sprechen auch die bekannten Fälle eineiiger Zwillinge. reduction and of the ripening, for these latter would...epoch — the final division of the oogonia — is the tatest one, at which the determination of sex can conceivably happen» (1902 a, S. 732). Und auf einer... | |
 | Francis Hugh Adam Marshall, William Cramer, James Lochhead - Electronic books - 1910 - 740 pages
...1908 ; " Sex Determination and Parthenogenesis in Phylloxera and Aphids," Scirnce, vol. xxix., 1909. be determined prior to the final phenomena of the...possess any influence on the size of the egg itself." 1 Beard states that the eggs of the skate, Raja batis, are likewise of two kinds. It is also pointed... | |
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... be determined prior to the final phenomena of the reduction and of the ripening, for these latter would not appear to possess any influence on the size of the egg itself. In other words, the size of the egg and its prospective destination, male or... 