Two rhinoceros beetles have different parents. They have different shape horns. why do the beetles have differently shape horns.

because they have different genes

Explanation:

when animals mate or reproduce the parents share each other genes to make thr offspring when that accurse different beetles can have different genes that could code for longer horns or shorter. Their could also be a mutation.

the wires in the toaster turning red and the toast crisping and turning brown

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.