Feather Color in Budgies Is Determined by Two Different Genes

question 19

Multiple Choice

Feather color in budgies is determined by two different genes: Y for pigment on the outside of the feather, and B for pigment on the inside of the feather. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white. A blue budgie is crossed with a white budgie. Which of the following results in the offspring is most possible?

• A) green offspring only
• B) white offspring only
• C) blue offspring only
• D) blue and white offspring

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