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N a type of parakeet known as a "budgie," feather color is controlled by two genes. A yellow pigment is synthesized under the control of a dominant allele YY. Budgies that are homozygous for the recessive yy allele do not synthesize yellow pigment. At an independently assorting gene, the dominant allele BB directs synthesis of a blue pigment. Recessive homozygotes with the bbbb genotype do not produce blue pigment. Budgies that produce both yellow and blue pigments have green feathers; those that produce only yellow pigment or only blue pigment have yellow or blue feathers, respectively; and budgies that produce neither pigment are white (albino). 

Determine the possible genotypes for green, yellow, blue, and albino budgies

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