biology vs genetics

biology and genetics both are nouns.

Word	Noun	Adjective	Verb	Adverb
biology	Yes	No	No	No
genetics	Yes	No	No	No

As nouns, genetics is a hyponym of biology; that is, genetics is a word with a more specific, narrower meaning than biology:

biology: the science that studies living organisms
genetics: the branch of biology that studies heredity and variation in organisms

biology (noun)	genetics (noun)
the science that studies living organisms	the branch of biology that studies heredity and variation in organisms
all the plant and animal life of a particular region
characteristic life processes and phenomena of living organisms