Ventor contributed significantly to humanity and science by discovering a synthetic cell. He did this by developing the genome of a bacterium and by inserting it into a cell. The cell was created by combining together the genome of a pathogen from small DNA stretches, which are produced in the laboratory.
The produced genome was then administered into a vacant cytoplasm of the associated bacterium. The pathogen utilized is known as Mycoplasma mycoides, it generally infests goats. The cell is the initial synthetic form of life in the world and has opened the gate for various kinds of researches.
Answer:Venter's contribution to science was the invention of a synthetic cell. The correct option is D. Craig Venter created a synthetic cell which is totally controlled by man-made genetic instructions.
A dominant trait can be shown both when an organism is homozygous dominant AND heterozygous. Two different genotypes give the same visible result so a testcross is needed to be able to accurately say if the organism is homozygous dominant or heterozygous