Phenotypes are only based on genotypes.

If a couple has a "one-in-four" risk of having a child with a disease, and their firstborn has the disease, the next child will still have a 25% of getting the disease.

All males have the genotype XY and all females have genotypes XX.

All mutations are harmful.

Evolution means that organisms changed "by chance"

Sex-linked alleles are only found on the X chromosome.

Which of the following is dominant?

Evolution explains the origin of ______________

Corals are dying due to global warming. Evolution will eventually help the corals to survive in warmer waters.