You have isolated a gene that is important for the produ...

Question

You have isolated a gene that is important for the production of milk and wish to study its regulation. You examine the genomes of human, mouse, dog, chicken, pufferfish, and yeast and note that all genomes except yeast have an orthologous gene.

What does the existence of orthologous genes in chicken and pufferfish tell you about the function of this gene?

Accepted Answer

Hello everyone. And welcome to today's video that some genes are derived from a common ancestral gene and have diverged through speciation events in different species. These genes may share similar nucleotide sequences, perform similar functions and have similar structures. These genes are called as answer choice A. We have analogous genes as answer choice B, we have orthos gene and as answer choice C we have para genes. Now let's go over these types of genes so that we may solve this question beginning by answer choice A which is going to be analogous genes. These genes have identical or similar function, but they're not going to share a common ancestor. And therefore we're going to cancel this out because we're stated in the question that they are derived from a common ancestral gene. Let's move on. We have answer choice C which is going to be paralyse genes. These are genes present in one particular organism that are related to each other through gene duplication. This is not really what the question is asking for. So we're going to cancel it out. And then finally, we have B which is Ortho genes. Now, these Ortho genes are going to be genes derived from a common ancestral gene. And because of this, they're going to have very similar nucleotide sequences, perform similar functions and have similar structures. Because of the fact that they're coming from this common ancestral gene, they are going to be related. And therefore we're going to select answer choice B or Togo's genes as a final answer to our question. I really hope this video helped you and I hope to see you on the next one.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing