It's not "a group of nouns", if that's what you mean, because "genetic" is not a noun. It is, however, a "noun phrase ", which is a head noun ( engineering ) together with its modifiers, of which there is only one in this case ( genetic ). Speaking informally, you might say "noun group", but that's not the proper term.
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ZBHSo my head noun would be engineeringYes.
ZBHgenetic would be my describer or classifier?Yes, but the proper term is 'modifier'.
ZBHI can never tell the difference between them!You need to meditate on these things.
ZBHSo my head noun would be engineering and genetic would be my describer or classifier?Yes. A noun is a person, place or thing.
ZBHwhat would that make earth?"the earth's" is a possessive, so it's a determiner.
ZBHendangered animals' genetic information[[[endangered] animals'] [genetic] information]