--- title: "Meaning & Key Takeaway of: Except for the rare cases of plastid…" description: "\"“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..." image: "https://sms4smile.com/quotes/i/859/thomas-hunt-morgan-42781_cases_except-for-the-rare-cases-of-plastid-inh_92229.jpg" --- # 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](https://sms4smile.com/quotes/i/859/thomas-hunt-morgan-42781_cases_except-for-the-rare-cases-of-plastid-inh_92229.jpg) [Download](https://sms4smile.com/quotes/i/859/thomas-hunt-morgan-42781_cases_except-for-the-rare-cases-of-plastid-inh_92229.jpg) [Open image](https://sms4smile.com/quotes/i/859/thomas-hunt-morgan-42781_cases_except-for-the-rare-cases-of-plastid-inh_92229.jpg) > ““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](https://sms4smile.com/quotes/author/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. ★ ★ ★ ★ ★ No ratings yet [Chromosomes](https://sms4smile.com/quotes/about/chromosomes/) [Evolution](https://sms4smile.com/quotes/about/evolution/) [Inheritance](https://sms4smile.com/quotes/about/inheritance/) [Science](https://sms4smile.com/quotes/about/science/) ## Related quotes > [For each chromosome contributed by the sperm there is a corresponding chromosome contributed by the egg, there are two chromosomes of each kind, which…](https://sms4smile.com/quotes/thomas-hunt-morgan/for-each-chromosome-contributed-by-the-sperm-there-is-a-corresponding/) [Thomas Hunt Morgan](https://sms4smile.com/quotes/author/thomas-hunt-morgan/) > [The egg of every species of animal or plant carries a definite number of bodies called chromosomes. The sperm carries the same number. 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