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Except for the rare cases of plastid inheritance, the…

“Except for the rare cases of plastid inheritance, the inheritance of all known cofactors can be sufficiently accounted for by the presence of genes in the chromosomes. In a word the cytoplasm may be ignored genetically.” quote by Thomas Hunt Morgan
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““Except for the rare cases of plastid inheritance, the inheritance of all known cofactors can be sufficiently accounted for by the presence of genes in the chromosomes. In a word the cytoplasm may be ignored genetically.””

Thomas Hunt Morgan

About This Quote

This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.

Most cellular components are encoded in nuclear DNA; cytoplasmic inheritance is rare and can be largely ignored in genetic models.

In simple terms: Genes in chromosomes explain most inheritance.

Key Takeaway

Cytoplasmic factors are minor in genetics.

Themes

genetics inheritance cell biology chromosomes

Mood

analytical objective

Type

scientific explanatory

When to use this quote

  • plant breeding
  • human disease genetics
  • microbial engineering

Key Concepts

Mendelian genetics maternal inheritance

Practical Applications

  • focus on nuclear DNA for trait mapping
  • simplify genetic models by excluding rare cytoplasmic effects

Questions to Reflect On

  • What exceptions challenge the nuclear‑DNA‑only view?
  • How do cytoplasmic elements influence evolution?
A Different Perspective

Some traits, like mitochondrial diseases, are crucially cytoplasmic and cannot be ignored.

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