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ARC-Challenge / Mercury_400091 / A student's mother is heterozygous for attached earlobes, a recessive trait. The…

Problem

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question

A student's mother is heterozygous for attached earlobes, a recessive trait. The student's father is also heterozygous for that trait. What is the percent likelihood that this student has attached earlobes?

choices

  • 0%
  • 25%
  • 50%
  • 75%

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