Chromosomes and Phenotype – Flashcards

Sex chromosomes determine an organism's . . . .

A person who is a carrier differs from a person who has a genetic disorder. A carrier (does / does not) show symptoms of a disorder but (can / cannot) pass the disorder to offspring.

Sex-linked genes are located on the . . . .

In humans, a gamete from a male determines the sex of the offspring, because a male can pass on (only X / only Y / either X or Y) chromosomes. In contrast, a female passes on (only X / only Y / either X or Y) chromosomes.

The genes on the Y chromosome are responsible for (male / female).

Show phenotypes from all sex-linked genes.

Show phenotypes similarly to autosomal gene expression.

A carrier is a person who "transports" a disease-causing allele to (offspring / parents).

With X chromosome inactivation, which occurs in (males / females), one of the two X chromosomes in every cell is randomly ("turned off" / "turned up").