Journal of Genetics, Volume 5Cambridge University Press, 1916 - Genetics |
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Page 66
... external genitalia of the cat are perfectly normal : there is a normal well developed penis , and both testes are descended into the scrotal sac ; this latter point is important , for as will be shown later failure of descent of the ...
... external genitalia of the cat are perfectly normal : there is a normal well developed penis , and both testes are descended into the scrotal sac ; this latter point is important , for as will be shown later failure of descent of the ...
Page 68
... female organs were also found on both sides and consisted of bodies presumed to be ovaries , situated just below the ... genitalia were composed of a small penis 2 cm . long , with a small external opening placed on the dorsal side ...
... female organs were also found on both sides and consisted of bodies presumed to be ovaries , situated just below the ... genitalia were composed of a small penis 2 cm . long , with a small external opening placed on the dorsal side ...
Page 78
... external characters , excluding the genitalia , is common . But in a very large number of instances the halving is not quite perfect . From those insects which show an almost complete halving of external characters we pass gradually to ...
... external characters , excluding the genitalia , is common . But in a very large number of instances the halving is not quite perfect . From those insects which show an almost complete halving of external characters we pass gradually to ...
Page 81
... external and internal . Though perfect halving of external parts is common in insects , it is very rarely met with in the genital apparatus . In Lepidoptera only a ... genital tract or a part of the external genitalia may E. A. COCKAYNE 81.
... external and internal . Though perfect halving of external parts is common in insects , it is very rarely met with in the genital apparatus . In Lepidoptera only a ... genital tract or a part of the external genitalia may E. A. COCKAYNE 81.
Page 82
genital tract or a part of the external genitalia may be found , but the part which is found may show doubling . There is thus no fundamental difference between lateral genetic and many primary somatic hermaphrodites . Secondary somatic ...
genital tract or a part of the external genitalia may be found , but the part which is found may show doubling . There is thus no fundamental difference between lateral genetic and many primary somatic hermaphrodites . Secondary somatic ...
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Common terms and phrases
4th fingers absence agouti agouti-black androconia appearance BBBA bird blue scales breast and flank bred bursae cells characters chromosomes colour condition cross cross-overs DDEEAA diploid doubles experiments external genitalia F₁ F₂ factors feathers female parent floribunda flowers forewing formosanus fully hoary gametes gave GgTt glabrous grossulariata gynandromorphs half-hoary halved gynandromorphs hermaphrodites heterochroic heterozygous homozygous hypothesis individuals inflorescence inheritance inter intermediate isabellina Journ JOURNAL OF GENETICS Kewensis lacticolor large number left side male parent male Reeves mating Mendelian mosaic musical mutation normal obtained occur offspring ovaries ovipositor parent species parthenogenesis pattern pedigree phalanx plants PLATE plumage pods produced quarter-hoary R. C. PUNNETT rachis ratio recessive recorded reevesi Right side male rogues seed segregation Series Sesamoid bones sexual side female skiagraphs somatic sterile Swinhoe testis tetraploid thigh-tuft tortoiseshell cat two-carpellary typical varieties Versicolor verticillata wings yellow
Popular passages
Page 292 - V *T1 z ^ c aa ^ a ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az...
Page 92 - WolfBan ducts which are present and derived from the non-potent elements; and the Wolffian bodies are given in somatic division. Thus the free-martin with a potent bull twin is the result of a division of a male zygote, so that the somatic determinants are equally divided, the genital determinants unequally divided, the potent going to the one twin, the potent bull, the non-potent genital determinants to the free-martin.
Page 173 - ... 15), whose work was exceedingly carefully executed, but whose conclusions had to be retracted eventually as they were too sweeping and based on insufficient data. Farmer and Digby ('14) found that the "total amount of chromatin substance in the nucleus of each of two types of hybrids known as Primula kewensis is the same. The nuclei of the one form of hybrid contains twice as many chromosomes as the nuclei of the other type, but the increase in number is associated with a corresponding diminution...
Page 79 - ... 1. Lateral. a. Ovary on one side. Testis on the other. b. Two ovaries on one side. Testis on the other. c. One ovary on one side. Two testes on the other. d. Two ovaries on one side. Two testes on the other. 2. Unilateral. Ovary or testis on one side. Ovary and testis on the other.