In a type of parakeet known as a \"budgie,\" feather color is controlled by two

Question

In 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 Y. Budgies that are homozygous for the recessive y allele do not synthesize yellow pigment. At an independently assorting gene, the dominant allele B directs synthesis of a blue pigment. Recessive homozygotes with the bb 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 Drag the appropriate items to their respective bins. Reset Help YYBB YYBb YYbb Yybb yybb YyBByyBB yyBb YyBb Blue Yellow Green Albino

Explanation / Answer

Blue: yyBB, yyBb

Only B is dominant, while y is recessive.So only blue pigment is produced.

Yellow: YYbb, Yybb

Y is dominant and b is recessive. So only yellow pigment is formed.

Green: YYBB, YYBb, YyBB, YyBb

At least one copy of both Y and B are present. So green pigment will be formed.

Albino: yybb

Both Y and B are absent. So no pigment will be formed.

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