Y chromosome(redirected from Y chromosomes)
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Y chromosomeor Y-chro·mo·some (wī′krō′mə-sōm′)
The sex chromosome associated with male characteristics in mammals, not occurring in females and occurring with one X chromosome in the male sex-chromosome pair.
a sex chromosome of humans and most mammals that is present only in males and is paired with an Xchromosome. Compare X chromosome.