noun
Usage: usually capitalized Y
: a sex chromosome ordinarily occurring only in the male zygote and cells and formerly supposed to carry factors for maleness that are now usually thought to exist in autosomes — compare x chromosome
noun
Usage: usually capitalized Y
: a sex chromosome ordinarily occurring only in the male zygote and cells and formerly supposed to carry factors for maleness that are now usually thought to exist in autosomes — compare x chromosome
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012