Acondition that describes an individual that carries two different alleles of a gene

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

What process creates gametes? a. fertilization b. mitosis c. meiosis

Closing romer’s gap. what is the significance of the new fossil evidence found in scotland? answer in claim evidence and reasoning