Chromosomal Mutations in Twin Zygotes - A Model for Speciation #989344

How do new species arise? Since Darwin's On the Origin of Species (1859), natural selection has dominated evolutionary biology — yet persistent gaps and unresolved puzzles have continued to trouble careful observers. This book, authored by Jianyi Zhang, presents an independent challenge to Neo-Darwinian synthesis, grounded not in skepticism of science but in rigorous commitment to Karl Popper's standard of falsifiability.
The essays build their argument systematically, starting from the fundamentals of heredity, DNA replication, chromosomal structure, and cell division, before surveying the principal theories of evolution since Darwin. This foundation prepares the reader for the book's central contribution: the Twin Zygotes Model of speciation.
The model addresses a classic problem — the "hopeful monster" objection — by proposing that new species do not emerge from solitary mutants but from twin or multiple fertilized eggs within the same mother, in which the same gross chromosomal mutation occurs simultaneously, producing at least one male and one female with matching chromosomal structures. All four elements of this mechanism are grounded in established reproductive biology, making the model empirically testable rather than merely speculative.
The preface also engages in the sociology of science, noting that institutions resist heterodox ideas — citing Lynn Margulis's endosymbiosis theory as a cautionary example — while affirming that consensus and truth are never identical. Unusually, the book also explores moral implications: the Twin Zygotes Model, with its emphasis on cooperative inbreeding among related individuals, offers a biological basis for altruism that Darwinian competition-based frameworks struggle to explain.
Readers are invited not to simply believe, but to engage — on the terms any genuine scientific theory demands: observable predictions, testable mechanisms, and openness to evidence.