Answer:
allele - different forms or versions of genes
chromosomes - structures that carry genetic information (passed from biological parents to offspring)
homologous - similar in structure
locus - a particular site or location
Explanation:
Mutation would be the best answer.
The most logical answer is D, because, we can infer that they belong to the same genus in taxonomy, but they are different species
2. Endothermic, absorbing
Hope this helps :)