In people sickle cell disease is codominant. When an individual is
heterozygous they have both normal and sickled cells. If an individual has
only recessive alleles, they have only sickle shaped cells. What is the
phenotypic ratio of offspring with two heterozygous parents? *

below

Explanation:

in the screenshot

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

the endomembrane system i think