Question

When analyzing a pedigree, how can you determine if an individual is a carrier (heterozygous) for the trait being studied?

Answer 1

both parents are not showing the trait while one of the children is showing it, then the parents must be heterozygous ...

Answer 2

Answer:

One can only determine a carrier by complete Penetrance.

If an individual in the pedigree carries one significant allele or two recessive alleles for a trait, then the individual will show the signs of phenotype connected with the trait.

The reading of the pedigree should be started from the last generation.

You will need to have a proper clue to understand whether an individual is a heterozygous.