- a sex chromosome of humans and most mammals that is present only in males and is paired with an X chromosome.
Compare X chromosome.
Origin of Y chromosome
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the sex chromosome that occurs as one of a pair with the X-chromosome in the diploid cells of the males of many animals, including humansCompare X-chromosome
- The sex chromosome associated with male characteristics, occurring with one X-chromosome in the male sex chromosome pair.
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