Plant agriculture and animal domestication developed independently several times and in different locations in human history. Do a brief Internet search and then list the approximate locations, time periods, and crops developed in three of these agricultural events. What role do you think ideas about heredity may have played in these events?

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Hi, everyone. Welcome back. Here's our next problem. It says the theory which states that organisms were derived from substances found in the sex cells is referred to as and we have choices of a EPA genesis be pre formation, see cytoplasmic inheritance and Dheepan genesis. Well, if we just can't remember at all, one clue that can help is you've got to answer to the word genesis, um genesis meaning, you know, beginning birth. So that's kind of a good heads up that that is there's a good chance. One of those is our answer. And when we look at Joyce Dheepan Genesis, um pan means like many overall. And since we're looking for a theory that states that organisms are derived some substances found just in the sex cells, um most likely we'd be looking at EPA genesis versus pan genesis. So that's just if you got this question on a test and just couldn't recall um what the term was and indeed choice. A EPA Genesis is the phrase or is the theory that says that organisms were derived from substances found in the sex cells. So let's look at our other answer. Choices to see why they're not correct choice. B says pre formation, as you might imagine like formation early on formation before birth, pre formation was the idea that the sex cells contained a miniature adult that grew. This is the idea of the Hohmann Uncle Asse. Um You might have seen a picture of a little sperm cell with a little tiny baby inside of it. So again, the idea that this um baby existed pre formed inside the sex cells, particularly the sperm. Um but that's not our correct answer even though it's close because our theory we're looking for is that organisms were derived from substances found in the sex cells, not just a miniature human existing there. So that's not the correct answer. Choice. C says cytoplasmic inheritance. Well, this isn't a theory of the generation of organisms. It just refers to how mitochondria and chloroplasts are randomly distributed to daughter cells. So the fact that the nuclear DNA comes from inheritance by, from both parents, from the germ cells of both parents. But that the materials, the cytoplasm, the mitochondrial D N A or the chloroplasts, other organelles are inherited from things that are in the cytoplasm of the egg and their inheritance by the offspring. So it's not a theory of how organisms are generated. But the idea that you get the, what's in the cytoplasm um randomly distributed to the daughter cells and finally choice Dheepan genesis. Um Again, we talked about that prefix pan and what that means. And pan genesis was a theory that there were these gem ual particles that were brought to the reproductive organs from different body parts. So the pan comes in because idea that there was these particles brought from all over the body and then sort of concentrated in the reproductive organs. But that's not the answer that we're looking for. So we're going to cross that out. And again, the theory that states that organisms were derived from the substances found in the sex cells is referred to as choice. A epa genesis. See you in the next video.

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Key Concepts

Domestication of Plants and Animals

Heredity and Genetic Variation

Agricultural Revolution