Which property refers to how a mineral reflects light ,density hardness ,luster ,streak

What is the name for a substance formed in a chemical reaction

Plz ! ive been stuck on this forever

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .