This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, which of the following statements is true

Answer:
Individuals #3 and #4 must be heterozygous for the trait.
Explanation:
A heterozygotic person has this genotype: Aa
A homozygotic dominant person has this genotype: AA
A homozygotic recessive person has this genotype: aa
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