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| | Dr John Pilkington answers questions on Genetics |
 | | In the case of the hen, since her sex chromosome pair are made of one X chromosome and one Y chromosome, she has the XY genotype and for a hen to appear as a visual Albino, she must have the XiY genotype. |
 | | Further, Albinos prefer lower light levels because there is no pigmentation in the eyes, thus the amount of light entering the eye cannot be controlled by the iris, as in the normal eye. |
 | | However, in the protected environment of a bird room, the level of UV light is considerably less than in the open of the Australian bush, and so Albinos in captivity, unless forced to remain in the unprotected outdoors, show no ill-effects from their genetic condition. |
| www.budgerigars.co.uk /genetics/questions/question18.html (613 words) |
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