A researcher is creating pedigrees for a trait he suspects to be dominant in humans. what are some of the likely features of his pedigrees for families with this trait?

A feature of a pedigree that indicate that a certain trait is a dominant trait is that one of the parents always have to have the trait.

There are, however, autosomal dominance and X-linked dominance.

For an autosomal dominant trait:

- Appears equally frequent in both sexes.

- Both sexes transmit the trait.

- Present in all generations.

- When one parent has the trait and the other doesn't, approximately half of the offspring will present the trait.

For a X-linked dominant trait:

- Both male and females can present the trait, but more females usually present it.

- Sons with the trait always have a mother that presents the trait as well.

- Daughters with the trait always have either a mother or father that presents the trait, or both.

- Fathers with the trait always have daughters with the same trait.