An alternative form or version of a gene is a(n): A allele
B karyotype.
C homologous chromosome.
D non-homan alternative form or version of a gene is a(n):
A allele
B karyotype.
C homologous chromosome.
D non-homologous chromosome.

The answer is A.allele

Explanation:

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.

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