Final answer:
In pedigree charts, a shaded square represents a male with the trait, a shaded circle represents a female with the trait.
Step-by-step explanation:
In pedigree charts, the following symbols represent:
- Shaded square: Represents a male individual who has the trait being traced.
- Shaded circle: Represents a female individual who has the trait being traced.
- Clear square: Represents a male individual who does not have the trait being traced.
- Clear circle: Represents a female individual who does not have the trait being traced.
- Shape that is half shaded and half clear: Represents an individual who is heterozygous for the trait being traced, which means they carry one copy of the dominant allele and one copy of the recessive allele.