What are the four steps of natural selection?

•Variation. Organisms (within populations) exhibit individual variation in appearance and behavior. ...

•Inheritance. Some traits are consistently passed on from parent to offspring. ...

•High rate of population growth. ...

•Differential survival and reproduction

reproduction, heredity, variation in fitness or organisms

Explanation:

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

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osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.