"pedigree collapse" meaning in English

{
  "etymology_text": "Coined by Robert C. Gunderson.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "pedigree collapse (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Genealogy",
          "orig": "en:Genealogy",
          "parents": [
            "Genetics",
            "History",
            "Biology",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1989, Jonathan Benthall, “The ‘Annual Review’ 1988 Reviewed: He but There-to Come(s) No(t) / Which-Who Fear(s) Deep Water”, in Anthropology Today, V, № 5 (October 1989), page 16",
          "text": "Less well-known is the argument that we may all have a single mitochondrial foundress — not necessarily a single ancestress — owing to the likelihood of ‘lineage extinction’ and ‘pedigree collapse’ as a result of mating with cousins, small population sizes, and high mortality before reproductive age.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "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)."
      ],
      "id": "en-pedigree_collapse-en-noun-CIhJCFi1",
      "links": [
        [
          "genealogy",
          "genealogy"
        ],
        [
          "phenomenon",
          "phenomenon"
        ],
        [
          "inbreeding",
          "inbreeding"
        ],
        [
          "descendant",
          "descendant"
        ],
        [
          "binary tree",
          "binary tree"
        ]
      ],
      "qualifier": "genealogy",
      "raw_glosses": [
        "(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)."
      ],
      "related": [
        {
          "word": "implex"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "phenomenon in genealogy",
          "word": "Ahnenschwund"
        }
      ],
      "wikipedia": [
        "Robert C. Gunderson"
      ]
    }
  ],
  "word": "pedigree collapse"
}

{
  "etymology_text": "Coined by Robert C. Gunderson.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "pedigree collapse (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "implex"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Terms with German translations",
        "en:Genealogy"
      ],
      "examples": [
        {
          "ref": "1989, Jonathan Benthall, “The ‘Annual Review’ 1988 Reviewed: He but There-to Come(s) No(t) / Which-Who Fear(s) Deep Water”, in Anthropology Today, V, № 5 (October 1989), page 16",
          "text": "Less well-known is the argument that we may all have a single mitochondrial foundress — not necessarily a single ancestress — owing to the likelihood of ‘lineage extinction’ and ‘pedigree collapse’ as a result of mating with cousins, small population sizes, and high mortality before reproductive age.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "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)."
      ],
      "links": [
        [
          "genealogy",
          "genealogy"
        ],
        [
          "phenomenon",
          "phenomenon"
        ],
        [
          "inbreeding",
          "inbreeding"
        ],
        [
          "descendant",
          "descendant"
        ],
        [
          "binary tree",
          "binary tree"
        ]
      ],
      "qualifier": "genealogy",
      "raw_glosses": [
        "(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)."
      ],
      "tags": [
        "uncountable"
      ],
      "wikipedia": [
        "Robert C. Gunderson"
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "phenomenon in genealogy",
      "word": "Ahnenschwund"
    }
  ],
  "word": "pedigree collapse"
}