A completely filled circle represents that the person expresses the trait.
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Answer:
Petroleum refining processes are the chemical engineering processes and other facilities used in petroleum refineries (also referred to as oil refineries) to transform crude oil into useful products such as liquefied petroleum gas (LPG), gasoline or petrol, kerosene, jet fuel, diesel oil and fuel oils.
Explanation:
The answer is C: That both parents show characteristics of dominant traits<span />