At a cellular level, sexual reproduction involves the fusion of two cells into one. Some biologists have proposed early conditions (such as life in a pool that is drying up) that could have promoted primitive cells trying to engulf members of their own species but they succeeded in only fusing together. That means that the real evolutionary question may be the following: How could these early cells reduce the chromosome number by half? Consider the stages in mitotic division. Which processes in both nuclear replication and division, and cytokinesis, would need to be turned on or turned off in order to move from mitosis to meiosis?

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The Answer of At a cellular level, sexual reproduction involves the fusion of two cells into one. Some biologists have proposed early conditions (such as life in a pool that is drying up) that could have promoted primitive cells trying to engulf members of their own species but they succeeded in only fusing together. That means that the real evolutionary question may be the following: How could these early cells reduce the chromosome number by half? Consider the stages in mitotic division. Which processes in both nuclear replication and division, and cytokinesis, would need to be turned on or turned off in order to move from mitosis to meiosis?

At a Cellular Level, Sexual Reproduction Involves the Fusion of Two