sex chromosome
Noun
Meaning
(genetics) a chromosome that determines the sex of an individual
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Examples
mammals normally have two sex chromosomes
Genetic sex-determination usually depends on asymmetrically inherited sex chromosomes which carry genetic features that influence development ; sex may be determined either by the presence of a sex chromosome or by how many the organism has.
Transcaucasian mole voles ( Ellobius lutescens ) also have a form of XO determination, in which both genders lack a second sex chromosome.
Human chromosomes Chromosomes in humans can be divided into two types: autosomes (body chromosome(s)) and allosome ( sex chromosome (s)).
Once in every 500 male births, for example, the sex chromosome complement is XXY rather than XY, thus erring in the direction of femaleness.
The 0 denotes the absence of a second sex chromosome.