Propose an experiment to test the hypothesis that cells from only one region of a frog blastula form the ectoderm. What results from this experiment would support this hypothesis?

Verified step by step guidance

1. Step 1: Understand the hypothesis. The hypothesis states that cells from only one region of a frog blastula form the ectoderm. The ectoderm is the outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis, and nerve tissue.
2. Step 2: Design the experiment. One way to test this hypothesis is through a technique called fate mapping. This involves marking cells in a specific region of the blastula and then tracking where these cells end up in the later stages of development. In this case, you would mark cells in one region of the frog blastula and then observe whether these cells form the ectoderm.
3. Step 3: Conduct the experiment. Use a non-toxic dye or a fluorescent protein to mark the cells in the specific region of the frog blastula. Then, allow the frog embryo to develop normally.
4. Step 4: Observe and record the results. After the frog embryo has developed, observe where the marked cells have ended up. If the marked cells form the ectoderm, this would support the hypothesis.
5. Step 5: Analyze and interpret the results. If the marked cells are found in the ectoderm, this would support the hypothesis that cells from only one region of a frog blastula form the ectoderm. If the marked cells are found in other layers as well, this would suggest that cells from other regions can also contribute to the formation of the ectoderm.

Video transcript

Welcome back. Here's our next problem. It says during gas relation the blast chiller reorganizes into two primary germ layers. The inner layer is called blank and the outer layer is called blank. So our first term we're looking for is the inner layer. That inner primary germ layer and that is the end of term that is going to go on to form things like the gut lining. So those lining cells and many of the internal organs. The outer layer is the ectodermal that will become things like the skin, hair, nails and the nervous system. So let's look over at our answer choices. We know that the inner layer it has to be the first term so that endowed ERM must be our first choice. So let's eliminate choices that don't have that choice has ectodermal. The first choice. It's incorrect. Well when we have these two primary germ layers in most animals um cells of the endangerment ectodermal interact to form a middle layer called the measure that will go on to become bone muscle connective tissue. But that's going to be this middle layer that develops from this interaction. So that's not our answer. So Choice B. And Choice D. Correctly have endured ERM first but Choice C. Has ectodermal correctly in the second spot. So Choice C. Is our answer. Choice D. Has measured ERM as a second term again measured ERM being that middle layer that develops from the interaction of the outer and inner one but not our answer here. So again. During gas relation the blast reorganizes into two primary germ layers. The inner layer is called and we have choice C endowed ERM The outer layer is called ectodermal. And one little key here is if you think of inner and endowed ERM you have that that end sound. To help you remember the connection of endowed um with inner. We'll have to see you in the next video.