最終更新日:2022/12/24

The uneven number discovered in the four species mentioned may have arisen in one of two ways : through bastardization, or through a mitotic abnormality, each of which possibilities may now be considered. In the case of bastardization of a germ cell with one chromosomal number by a germ cell from another species with a different number, the uneven number eleven might be secured if a paternal germ cell of a species A, with the normal chromosomal number twelve, fertilizes a maternal germ cell of a species B with the normal number ten.

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