Humans carry all of the genes necessary to develop a tail, but we typically don't develop tails because:
A) those genes are never activated.
B) those genes can only be activated by external factors that no longer exist in our present environment.
C) we have also inherited a copy of the dominant "no tails" gene.
D) we have also inherited two recessive "no tails" genes.

Question

Quizplus · Accepted Answer

Humans carry vestigial genes for a tail, but these genes are usually never activated. This is because they are suppressed during embryonic development due to other genetic and environmental factors.

Humans Carry All of the Genes Necessary to Develop a Tail