Joshua Is Colorblind, but Neither of His Parents Are Colorblind

question 5

Multiple Choice

Joshua is colorblind, but neither of his parents are colorblind. Which of the following is the most likely scenario?

• A) He is adopted.
• B) His mother is a carrier for the colorblind trait.
• C) His father is heterozygous for the colorblind trait.
• D) His father must be colorblind.

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