Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian Islands have different elaborate courtship rituals. These rituals involve fighting other males and making stylized movements that attract females. What type of reproductive isolation does this represent?
a. Habitat isolation
b. Temporal isolation
c. Behavioral isolation
d. Gametic isolation

Question

a. Habitat isolation

b. Temporal isolation

c. Behavioral isolation

d. Gametic isolation

Accepted Answer

Welcome back. Our next problem says two types of flowers exist in the same area. One flower blooms during summer and the other blooms during spring. Since the two flower types cannot cross pollinate due to the difference in seasons, they evolve into two different species. This type of reproductive isolation is called and our choices are a comedic isolation. Be behavioral isolation. C habitat isolation. The temporal isolation. So when we look at why these two species can't interbreed, we see that's because they are blooming or be able to reproduce at different times. And so when we look at these choices, temporal means relating to time. So our correct answer is d temporal isolation. But let's look at these other answers and see why they are not correct for the situation. Comedic isolation. Choice A. Is when the gametes can come into contact, but no fertilization can take place. So perhaps the species are just two distinct to different but no fertilization can take place. Well, this is not the case. These two flower types would be able to if they were blooming at the same time, so we can eliminate choice A. Choice B says behavioral isolation. This is when the two species might be in the same habitat, same location, but due to differences in behavior, perhaps they have different courtship rituals or other mating behaviors. They will not mate will not exchange genes. So we're talking about flowers obviously behavioral isolation is not going to be an issue. So we eliminate B. And choice E. Says habitat isolation. That would be when the two species need a different habitat. They're not physically in the same place, but we do know that specifically. It says that the flowers exist in the same area, so it would not be habitat isolation, so not choice. See so again, a correct answer is temporal isolation having to do with time the blooming in the two different seasons. See you in the next video.

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Key Concepts

Reproductive Isolation

Behavioral Isolation

Courtship Rituals