Reports to the Evolution Committee of the Royal Society. 1-5.

Date:
1902-1910
Catalogue details

Licence: In copyright

Credit: Reports to the Evolution Committee of the Royal Society. 1-5. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    Parents. Offspring. Grametic factors. Cross 8... Cream. Black. Choco- late. Black. Albino. 211,? 211 ^ 211 ^ 211 <? 251,? 256? 256? 256? 257? 257? Dense or dilute. 249? 240? 236? 13? 236? Dilute. 143 J 273 <? 329^ 134 c? 273 (? Dense or dilute. 3 3 4 7 9 2 1 4 3 4 1 1 All the creams carried recessive albinism. Their gametes were gBBchC and gBRchc. Similarly some of the chocolates carried re- cessive albinism, gbRChC and gbRChc. Black, pure, gBEChC, except in the case of 236 ? , which also had gBRChc. Total coloured 40 Parents. Offspring. Grametic factors. Cross 9... Eed, ruby-eyed. Chocolate. Cinnamon. Albino. 312^ ■ 279? 8 GbEchC, gbEChC, 314? 309 <? 2 1 abEchc, gbEChc. 369 c? 220? 8 Thus 312 and 369 may have been homozygous in G, but the numbers are too small to justify a definite conclusion. Parents. Offspring. Grametic factors. Cross 10. Cream, ruby-eyed. Chocolate. Cinnamon. Chocolate. Albino. 427 ^ 261? 1 (golden) 1 1 ^bEch^ 427 c? 427,? 261? 433? 3 (yellow) 1 (golden) 1 g c and gbEChJ As was to be expected, the same cream which, when crossed with chocolate, gives cinnamon and chocolate, when crossed with black gives agouti and black, seeing that Cross 10 shows that it is hetero- zygous in G, g.