Evolution, 4th Edition

All AbouT SEx 259 fitness. These kinds of displays are called “indicator traits” because they indicate to females a male’s genet ...

260 CHAPTER 10 Sexual selection in flowering plants It may sound odd to suggest that sexual selection occurs in plants: males ha ...

All AbouT SEx 261 If the sex ratio can evolve, why does natural selection seem to favor equal num- bers of males and females? At ...

262 CHAPTER 10 mutation that causes females to make more sons will be selected against because only females leave the fig to sta ...

All AbouT SEx 263 Why Sex? The simplest but most profound question about sex is why it exists at all. Sex is not the only option ...

264 CHAPTER 10 dandelion (see Figure 10.20C), which is very successful at colonizing new patches of habitat, gain an advantage f ...

All AbouT SEx 265 change, we expect that a set of cards that were successful the last time will also be successful the next time ...

266 CHAPTER 10 has the A mutation, and that may take a substantial time. In short, spread of the beneficial A mutation interfere ...

All AbouT SEx 267 (Metaphorically, the ruby is thrown out with the rubbish.) The second possibility is that the beneficial mutat ...

268 CHAPTER 10 that none of those individuals will leave any offspring. In a sexual popu- lation, recombination can regenerate t ...

All AbouT SEx 269 Selfing and outcrossing Some hermaphroditic plants and animals have evolved a compromise between sexual and as ...

270 CHAPTER 10 Inbreeding depression also results when close relatives mate. In some species, inbreeding depression is severe. T ...

■■Animals, plants, and microbes have evolved diverse forms of sexual reproduction, which is the mixing of genetic material from ...

SuGGESTIoNS FoR FuRTHER READING As with so many topics in evolutionary biology, Charles Darwin wrote not only the first but also ...

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Who has not dreamed of living forever? We know we won’t. Someone born in Japan today has a life expectancy of about 83 years. A ...

276 CHAPTER 11 Clearly, life spans can evolve. It is possible that senescence does not occur in some clonally propagated organis ...

How To BE FiT 277 how low fecundity or a short life span can evolve by natural selection. In think- ing about this, we must be c ...

278 CHAPTER 11 Costs of reproduction Is there evidence for a cost of reproduction? This concept plays a large role in the theory ...