A tool-kit gene is               .

Video transcript

Hello everyone. And in today's video we have the following problems. So there are the genes that regulate the development of similar morphological phenotype across diverse species. Remember this term across We're talking about genes that are similar or that work across species. Now that we know this, let's analyze each of the types of genes presented so that we can begin eliminating them beginning by answer choice D mutant genes. And these are simply genes that have undergone mutations. These genes have no specific function, other that they have been mutated by changing certain parts of the gene. So we're going to eliminate these as they are not the genes that the question is talking about. Then we have gap jeans and these gap genes are present in arthropods only and they are involved with embryo segmentation. So they're really not going to be the genes that regulate the development of similar morphological phenotype across diverse species. So we're going to cancel it out as well. Then we have homoerotic genes and again these genes work within a species and these homoerotic genes are what we call master regulators. And these master regulators allow the formation of certain body parts or they just direct the formation of certain body parts. So we're going to cancel this out as well because they're not. The genes are regulated development of similar morphological phenotype across diverse species. And this all leaves us with two k jeans and this is actually our correct answer choice. They are in fact the genes that regulate the development of similar morphological phenotype across species. So we're going to highlight answer choice a as a final answer to our question. I really hope this helped you, and I hope to see you on the next one.