The specification of the anterior–posterior axis in Drosophila embryos is initially controlled by various gene products that are synthesized and stored in the mature egg following oogenesis. Mutations in these genes result in abnormalities of the axis during embryogenesis. These mutations illustrate maternal effect. How do such mutations vary from those produced by organelle heredity? Devise a set of parallel crosses and expected outcomes involving mutant genes that contrast maternal effect and organelle heredity.

Video transcript

Everyone. Let's take a look at this question together. Which of the following describes the embryo formed from a home. A saga's mother fly for the mutant allele for the bike oid gene. So let's recall what we know about the bike hygiene and what a mutant allele found within that gene would do to the embryo that would form from this homosexuals mother fly. So we know that that bike hygiene is the gene that is important in specifying the development of the interior fortune of the why. And when you have that Hamas, Argus mother fly that has that mutant allele. So we have the Hamas I guess mother with that mutation, the embryo that is formed would have under developed interior areas because a mutation in that uh liel would affect the development of that interior portion of the fly. And when we have that home is Argus mother who has the mutation, we end up with those underdeveloped interior areas which that interior area of the fly is the head and the thorax. So, answer choice B. Is the correct answer because when we have a homogeneous mother fly for the mutant allele of that by coi gene, we end up with underdeveloped interior areas or underdeveloped head and thorax, which is answer choice B. The correct answer, I hope you found this video to be helpful. Thank you and goodbye