Last Updated:2025/11/28
(genealogy) The phenomenon in which ancestral inbreeding causes the number of a descendant’s distinct ancestors to be smaller than that predicted by a binary tree (∑ᵢ₌₁ⁿ 2ⁱ, where n represents the number of generations).
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pedigree collapse
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Source Word
pedigree collapse
Noun
uncountable
Japanese Meaning
先祖近親交配により、子孫が持つ固有の先祖数が、世代ごとに倍々に増加するという理論上の数(2のn乗の和)よりも少なくなる現象