Early development in Drosophila is atypical in that patt...

Question

Early development in Drosophila is atypical in that pattern formation takes place in a syncytial blastoderm, allowing free diffusion of transcription factors between nuclei. In many other animal species, the fertilized egg is divided by cellular cleavages into a larger and larger number of smaller and smaller cells.

How must the model that describes Drosophila development be modified for describing animal species whose early development is not syncytial?

Accepted Answer

Everyone. Let's take a look at this question together, the formation of a sensational blastoderm inro Sophal imposes unique constraints on the mechanisms of pattern formation, including the free diffusion of molecules and limited cytoplasmic space. How were these challenges overcome? Is it answer choice? A through rapid cellular division, answer choice B through delayed cellular differentiation. Answer choice C through a reduction in the number of daughter cells or answer choice D through the use of maternal genes. Let's work this problem out together to try to figure out how these challenges were overcome in your Sophal bio jeans and NANOS genes were used because the bio genes and the nanos genes form radiance and they provide positional information to the developing embryo. And since these bio genes and the nanos genes provide that positional information to that developing embryo, they were able to overcome those challenges of the mechanisms of pattern formation which include the free diffusion of molecules and the limited cytoplasmic space. And these bio genes and NANOS genes are a type of maternal effect jeans. So through the use of these maternal effect genes, they were able to overcome those challenges. So that means that answer choice. D through the use of maternal genes is the correct answer. Since those maternal effect genes form those gradients and provide the positional information to the developing embryo. And two types of those maternal effect genes are the bio genes and the nanos genes making answer choice. D the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

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