Zuzu is a white cat. She is genotype Ww for the "white masking gene" that reduces the number of melanocytes (pigment-containing cells). As a result, her body makes pigment, but it cannot get into the cells where it would color the fur. Zuzu's white masking gene is ________ to the melanin pigment gene because it prevents full expression of the pigment.
A) recessive
B) pleiotropic
C) epistatic
D) dominant
C) epistatic
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What term describes how most sponges can produce both male and female gametes?
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