| 释义 |
Definition of B chromosome in English: B chromosomenoun Genetics 1A chromosome reckoned as the second in various classifications; now disused. 2A small extra chromosome, found especially in plants and invertebrates, which has no equivalent in the basic chromosome set of a species, and has an irregular, non-Mendelian, mode of inheritance.
Origin Early 20th century; earliest use found in American Naturalist. Definition of B chromosome in US English: B chromosomenoun Genetics 1A chromosome reckoned as the second in various classifications; now disused. 2A small extra chromosome, found especially in plants and invertebrates, which has no equivalent in the basic chromosome set of a species, and has an irregular, non-Mendelian, mode of inheritance.
Origin Early 20th century; earliest use found in American Naturalist. |