sex chromosome vs chromosome

sex chromosome and chromosome both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex chromosome	Yes	No	No	No
chromosome	Yes	No	No	No

As nouns, chromosome is a hypernym of sex chromosome; that is, chromosome is a word with a broader meaning than sex chromosome:

sex chromosome: (genetics) a chromosome that determines the sex of an individual
chromosome: a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order

sex chromosome (noun)	chromosome (noun)
(genetics) a chromosome that determines the sex of an individual	a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order