Solve the CHAPTER MYSTERY GREEN PARAKEETS After consulting with the owner of the pet store, Susan realized she had a rare gift. White para- keets are very uncommon. The pet shop owner told Susan that two genes control feather color. A dominant Y allele results in the production of a yellow pigment. The dominant B allele controls melanin production. If the genotype contains capital Y (either YY or Yy) and a capital B, the off- spring will be green. If the genotype contains two lowercase y alleles, and a capital B, the offspring will be blue. If the genotype contains two lower- case y's and two lowercase b's, the offspring will be white.

1. Draw a Punnett square that accounts for the inheritance of blue pigment.

2. Construct a Punnett square that explains the inheritance of a white pigment.

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