You have crossed two Drosophila melanogaster individuals that have long wings and red eyes—the wild-type phenotype. In the progeny, curved wings and lozenge eyes mutant phenotypes appear as follows According to these data, is the curved-wing allele autosomal recessive, autosomal dominant, sex-linked recessive, or sex-linked dominant?

Video transcript

Hello everyone. And in today's video we have a problem regarding genetic studies. Jump straight into it. Wanting to assume that in a family, both the father and the mother are carriers of the genes of sickle cell anemia. One of the Children suffer from the disease. Two of them are carriers and one is normal. In this case the genes associated with psychosocial anemia are. So let's just quickly visualize this scenario that were given in the problem. So here we have two parents who are carriers. We have two Children who are carriers. We have one that is affected and one that is completely normal. Now the fact that we have carriers who are people that are able to have the genes but not actually express them means that the gene is recessive. If the gene was dominant, everyone that has, the gene will express express the trait of sickle cell anemia. So we can eliminate all dominant answers which is going to be B and D. Now we're left with either out of como or excellent. Now here in the scenario that were given were not really mentioned the success of the Children that were born from the father and the mother. So we cannot really predict it to be an excellent trait. It has to be an auto como recessive trait because of these characteristics. So we're going to highlight answer choice A as our final answer. Thank you very much for sticking around until the end of this video. And I really hope this helped you