Question

the different forms of a gene are called
hybrid
dna
chromosomes
alleles

Explanation:

The question is about the different forms of a gene. In biology (a subfield of Natural Science), alleles are defined as the different forms of a gene. "Hybrid" refers to an offspring of two different species/breeds, "DNA" is the genetic material, and "chromosomes" are structures containing DNA and genes. So the correct term is alleles.

Answer:

alleles