A species of cereal rye (Secale cereale) has a chromosome number ...

Question

A species of cereal rye (Secale cereale) has a chromosome number of 14, while a species of Canadian wild rye (Elymus canadensis) has a chromosome number of 28. Sterile hybrids can be produced by crossing Secale with Elymus.

What would be the expected chromosome number in the somatic cells of the hybrids?

Accepted Answer

Welcome back everyone. Here's our next question. Which of the following statements is true about cell division in somatic cells. So let's recall when we're thinking about the types of cell division, we're thinking about somatic cells. They use mitosis to divide and proliferate. So they're essentially cloning themselves producing identical cells. Um And then through different gene regulation and expression are gonna differentiate into the different types of cells. But in terms of just the cell division and replication, they're making identical copies of themselves. It's the germ cells that undergo mitosis to produce happily gametes. And that's only the germ cells. So this question is asking us about those somatic cells. So we want to keep in mind that we're talking about mitosis here. So with that in mind let's look at our answer choices here. Choice A. Says they produce genetically different daughter cells. Well that is not our answer. They do not produce different daughter cells, their daughter cells are identical to themselves. And in fact we can look down here at Choice D. And that is they produce genetically identical daughter cells so we can go ahead and choose that. But to be thorough, we'll keep looking at our other answers. Choice B says they produce hap Lloyd daughter cells. Well this is not correct again, it's the germ cells that do that. Um somatic cells since they're undergoing mitosis um produce deployed daughter cells and finally Choice C they undergo myopic cell division, not our answer. That's the germ cells somatic cells undergo mitosis. Cell division. So once again, which of the following statement is true about cell division and somatic cells choice D. They produce genetically identical daughter cells in the next video.

Key Concepts

Chromosome Number

Hybridization

Somatic Cells

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