A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back helped make possible the evolution of the tetrapod limb. This type of change is illustrative of a. the influence of environment on development. b. paedomorphosis. c. a change in a developmental gene or in its regulation that altered the spatial organization of body parts. d. heterochrony.

Video transcript

Hello everyone here we have a question asking us which of the following is responsible for the evolution of tetra problems. A changes in regulations of hawks genes. So of course we need to know what hawks genes are. There are a group of related genes that specified regions of the body plan of an embryo. So it is related to body plan. Be environmental circumstances, see metamorphosis or D. Hetero, cry me. So because hawks genes are responsible for body plan. Tetrapods developed one to what they are now as a result of changes in spatial arrangement of their hawks genes which is rearranging their body plan. So this led to changes in the way that their body is organized. So it was changes in regulations of hawks genes that is responsible for the evolution of tetra problems. So our answer is a thank you for watching. Bye.