The male gametes, it may be noted, are said to possess the essential characters of a Trypanosome.
In this latter case the determinants for black are carried by separate gametes from those carrying grey, and the two kinds of sex-cells exist in approximately equal numbers.
Or, to express it otherwise, an albino extracted from yellow parents, bred with an albino extracted from black parents, will give an albino offspring whose gametes in equal numbers are bearers of the black and yellow determinants.
An albino is a homozygote; that is, all its gametes are carrying the character of albinism and none of them bear the alternative character - the allelomorph - of pigmentation.
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