Which of the following is an example of heterochrony?
A) A gene whose expression causes legs to form
B) A gene whose expression inhibits the formation of legs
C) A gene whose expression causes one segment to start growing sooner than it would in the absence of that gene
D) A gene whose expression affects more than one module
E) None of the above

Question

Quizplus · Accepted Answer

Heterochrony is a change in the timing or rate of development of different structures within a species. Choice C describes a gene whose expression causes one segment to start growing sooner than it would in the absence of that gene, which is an example of heterochrony. Choices A and B refer to genes involved in the formation or inhibition of legs, which are not directly related to heterochrony. Choice D is too broad and ill-defined to provide a clear example of heterochrony.

Which of the Following Is an Example of Heterochrony