noun
Usage: usually capitalized Z
: a sex chromosome of the kind occurring doubled in the male and singly either with or without a W chromosome in organisms (as moths) in which the female is heterogametic — compare x chromosome
noun
Usage: usually capitalized Z
: a sex chromosome of the kind occurring doubled in the male and singly either with or without a W chromosome in organisms (as moths) in which the female is heterogametic — compare x chromosome
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012