Effect of extra prenatal testosterone on rabbit offspring at birth
... body weight (BW), litter size, and sex ratio. To avoid possible seasonal (sequential) effect, all of these measures were compared to the given does’ previous litters. As a result, male offspring had longer AGD, both in the low, and the high testosterone groups. However, sesame-oil alone also had som ...
... body weight (BW), litter size, and sex ratio. To avoid possible seasonal (sequential) effect, all of these measures were compared to the given does’ previous litters. As a result, male offspring had longer AGD, both in the low, and the high testosterone groups. However, sesame-oil alone also had som ...
File - Mrs. LeCompte
... environment does not have enough resources to support lots of offspring at one time Monogamous = when one male mates with only one female form a pair bond o Both male and female help with rearing of the young o Rare in primates Sexual Selection Most often is female choice, leading to male comp ...
... environment does not have enough resources to support lots of offspring at one time Monogamous = when one male mates with only one female form a pair bond o Both male and female help with rearing of the young o Rare in primates Sexual Selection Most often is female choice, leading to male comp ...
SUMMARY OF FINAL QUESTIONS Assessment questions Jen T
... 3. Those with traits which help survival tend to have more offspring, who inherit those traits. 4. Speciation ...
... 3. Those with traits which help survival tend to have more offspring, who inherit those traits. 4. Speciation ...
CPS Review of Concept 15.1
... The origin of new species, the extinction of species, and the evolution of major new features of living things are all changes that can be referred to as A B C D ...
... The origin of new species, the extinction of species, and the evolution of major new features of living things are all changes that can be referred to as A B C D ...
Turtle, Eastern Box
... or orange. Plastron has flexible hinge, allowing nearly complete shell closure. Head and legs have yellow markings. Male usually has red eyes, red on front legs and concave plastron. Toes are slightly webbed. Lifespan: Up to 138 years. Reproduction: Mating can occur spring through fall; female may r ...
... or orange. Plastron has flexible hinge, allowing nearly complete shell closure. Head and legs have yellow markings. Male usually has red eyes, red on front legs and concave plastron. Toes are slightly webbed. Lifespan: Up to 138 years. Reproduction: Mating can occur spring through fall; female may r ...
The PowerPoint
... In orang-utans and gorillas there is a marked difference in size between males and females. In these animals the male is much larger than the female. In contrast, there is very little sexual dimorphism in the sizes of chimpanzees and humans. Orang-utans and gorillas tend to form polygynous groups - ...
... In orang-utans and gorillas there is a marked difference in size between males and females. In these animals the male is much larger than the female. In contrast, there is very little sexual dimorphism in the sizes of chimpanzees and humans. Orang-utans and gorillas tend to form polygynous groups - ...
Intra-sexual selection
... 2. Big dominant male can coerce females to mate. Yet it might also be in the interest of females to do so, because of: genetic quality(?), protection, better resources ...
... 2. Big dominant male can coerce females to mate. Yet it might also be in the interest of females to do so, because of: genetic quality(?), protection, better resources ...
File
... Polyandry: When 1 female mates with more than 1 male. Do this to ensure survival of their offspring. There are also lots of examples of this found in ...
... Polyandry: When 1 female mates with more than 1 male. Do this to ensure survival of their offspring. There are also lots of examples of this found in ...
a WORD version of the handout
... 1. Sex with the higher parental investment should be discriminating when choosing a mate. (usually this is the female sex & term female choice) 2. Sex with the lower parental investment should mate as many times as possible. (usually the male sex & termed male-male competition) A. Sexual selection: ...
... 1. Sex with the higher parental investment should be discriminating when choosing a mate. (usually this is the female sex & term female choice) 2. Sex with the lower parental investment should mate as many times as possible. (usually the male sex & termed male-male competition) A. Sexual selection: ...
Book Review: Dual Sexual Strategy in Females—Is the Mysterious
... one should remember than in our evolutionary past (and that of mammals generally), females had far fewer fertile cycles than they experience today. They were more regularly pregnant or lactating (with suppressed ovulation). This might mean that if females have a different sexual strategy in the non- ...
... one should remember than in our evolutionary past (and that of mammals generally), females had far fewer fertile cycles than they experience today. They were more regularly pregnant or lactating (with suppressed ovulation). This might mean that if females have a different sexual strategy in the non- ...
PowerPoint Presentation - Sexual Selection (I)
... Why do male and female gametes differ in size? Geoffrey Parker et al.: divergent evolutionary selection favoured two types of gametes: small and mobile (sperm) sedentary and packed with nutrients (eggs) ...
... Why do male and female gametes differ in size? Geoffrey Parker et al.: divergent evolutionary selection favoured two types of gametes: small and mobile (sperm) sedentary and packed with nutrients (eggs) ...
Sexual Selection
... make--> a single mating may fertilize all her eggs •Females should be choosy about which male she mates with ...
... make--> a single mating may fertilize all her eggs •Females should be choosy about which male she mates with ...
Sexual Selection II - University of Arizona | Ecology and Evolutionary
... Sexual selection is a subset of natural selection that has to do with mating success. ...
... Sexual selection is a subset of natural selection that has to do with mating success. ...