Reproductive Biology and Phylogeny of Urodela
... the female parent is probable in Siren intermedia (Godley 1983), but care by either parent is unlikely in other members of the family, which scatter their eggs. Among taxa with internal fertilization, pond-breeding ambystomatids and salamandrids lack parental care. In stream-dwelling forms, parental ...
... the female parent is probable in Siren intermedia (Godley 1983), but care by either parent is unlikely in other members of the family, which scatter their eggs. Among taxa with internal fertilization, pond-breeding ambystomatids and salamandrids lack parental care. In stream-dwelling forms, parental ...
Segregation and the Evolution of Sex Under Overdominant Selection
... where s and t are positive selection coefficients less than or equal to one. With heterozygote advantage, one would expect the frequency of heterozygotes to rise to fixation within a fully asexual population, producing a strong negative one-locus genetic association (F ⫽ ⫺1). On the other hand, with ...
... where s and t are positive selection coefficients less than or equal to one. With heterozygote advantage, one would expect the frequency of heterozygotes to rise to fixation within a fully asexual population, producing a strong negative one-locus genetic association (F ⫽ ⫺1). On the other hand, with ...
ORIGINAL RESEARCH—EJACULATORY DISORDERS Premature
... Introduction. Premature ejaculation (PE) is the most common male sexual dysfunction affecting men and their partners. Lack of community-based data describing this condition limits understanding of PE and its outcomes. Aim. To characterize PE in a large population of men with and without PE using pat ...
... Introduction. Premature ejaculation (PE) is the most common male sexual dysfunction affecting men and their partners. Lack of community-based data describing this condition limits understanding of PE and its outcomes. Aim. To characterize PE in a large population of men with and without PE using pat ...
Document
... Cross-cultural studies of such groups of people as the Inis Baeg, Pohnpeians, and Mangaians suggest that American sexual behavior is normal compared to the strange behavior of others the sexual behavior of these groups is perverted the sexual behavior of Americans may appear as strange to others as ...
... Cross-cultural studies of such groups of people as the Inis Baeg, Pohnpeians, and Mangaians suggest that American sexual behavior is normal compared to the strange behavior of others the sexual behavior of these groups is perverted the sexual behavior of Americans may appear as strange to others as ...
Constructing sexual citizenship: theorizing sexual rights
... responsibilities as well as rights. In relation to sexuality, the question of responsibility has largely been concerned with establishing what are and what are not acceptable forms of expression of an assumed pregiven human need. That is, how are needs to engage in sexual activity to be met, in term ...
... responsibilities as well as rights. In relation to sexuality, the question of responsibility has largely been concerned with establishing what are and what are not acceptable forms of expression of an assumed pregiven human need. That is, how are needs to engage in sexual activity to be met, in term ...
2D:4D
... exposure leads to developmental instability which results in certain personality characteristics such as greater spatial ability, decreased verbal ability, increased aggression, increased number of sexual partners, and early age of first sexual experience. Past research is conclusive in suggesting t ...
... exposure leads to developmental instability which results in certain personality characteristics such as greater spatial ability, decreased verbal ability, increased aggression, increased number of sexual partners, and early age of first sexual experience. Past research is conclusive in suggesting t ...
... by the disease found that gonorrhea is most common 10.4 per hundred thousand people, followed by syphilis 4.7 per hundred thousand AIDS 4.0 pus. in harness 3.3 per hundred thousand population chancre 0.9 per hundred thousand population. And venereal disease of the lymphatic glands and 0.5 per thousa ...
The origin of species by means of ecological selection
... careless readers to equate ecological speciation with speciation with gene flow, and it may well encourage neglect of allopatric divergence even though it is probably more common. There is much more to be learned about allopatric divergence, and this knowledge is crucial for some of the very questio ...
... careless readers to equate ecological speciation with speciation with gene flow, and it may well encourage neglect of allopatric divergence even though it is probably more common. There is much more to be learned about allopatric divergence, and this knowledge is crucial for some of the very questio ...
Annotated bib final
... Yule, 2011). This lack of group difference in genital response is consistent with a growing body of evidence that women, regardless of stated sexual preferences and type of erotic material, respond in a similar manner with regard to their genital sexual response.” (300) Subclaim 3: There are multip ...
... Yule, 2011). This lack of group difference in genital response is consistent with a growing body of evidence that women, regardless of stated sexual preferences and type of erotic material, respond in a similar manner with regard to their genital sexual response.” (300) Subclaim 3: There are multip ...
Question paper - Paper 2H - June 2010
... normal person. Use the photographs to describe how the chromosomes are different. ...
... normal person. Use the photographs to describe how the chromosomes are different. ...
Sexual Misconduct and Enactment
... even to avoid enactments—as if one could. In an endeavor as complex as psychotherapy, enactments that put therapist and patient on a slippery slope are as inevitable a part of the work as a slippery snow-covered slope is to the endeavor of skiing. In fact, in both situations the trick is to learn to ...
... even to avoid enactments—as if one could. In an endeavor as complex as psychotherapy, enactments that put therapist and patient on a slippery slope are as inevitable a part of the work as a slippery snow-covered slope is to the endeavor of skiing. In fact, in both situations the trick is to learn to ...
A penological approach to the social construct of
... The authors found that neither model could be successfully applied in explaining why these behaviors occurred, instead concluding that a better method for approaching the question of which model works better would be one that addresses the process by which an inmate is exposed to the prison environm ...
... The authors found that neither model could be successfully applied in explaining why these behaviors occurred, instead concluding that a better method for approaching the question of which model works better would be one that addresses the process by which an inmate is exposed to the prison environm ...
PDF - Hofstra University
... law no longer requires resistance, the public, including jurors, still considers physical resistance and injuries as the hallmarks of “real” rape. This mindset seriously undermines the judicial process because it is commonplace for rape victims to not offer physical resistance. There are several rea ...
... law no longer requires resistance, the public, including jurors, still considers physical resistance and injuries as the hallmarks of “real” rape. This mindset seriously undermines the judicial process because it is commonplace for rape victims to not offer physical resistance. There are several rea ...
The Journal of Neuroscience, October 8, 2003, 23(27):9185
... connections between the MPOA and LCTF are essential for copulation. These studies did not elucidate the precise role of the respective regions in sexual behavior. There are two reasons for the problems with determining the precise role of c-Fos in these events: (1) c-Fos has a temporal resolution of ...
... connections between the MPOA and LCTF are essential for copulation. These studies did not elucidate the precise role of the respective regions in sexual behavior. There are two reasons for the problems with determining the precise role of c-Fos in these events: (1) c-Fos has a temporal resolution of ...
Macrotrachela quadricornifera featured in a space experiment
... are metazoans, made of about 1000 cells, and have tissues and organs, a complete gut, yet they are very simple animals. This simplification allows analysis of complex problems through easier approaches. (B) Miniaturization. Rotifers are small in size and need small volumes to be cultivated. (C) Life ...
... are metazoans, made of about 1000 cells, and have tissues and organs, a complete gut, yet they are very simple animals. This simplification allows analysis of complex problems through easier approaches. (B) Miniaturization. Rotifers are small in size and need small volumes to be cultivated. (C) Life ...
Optimal climbing speed explains the evolution of extreme sexual
... n = 25; Thomisidae, n = 4; Theridiidae, n = 13 and Pholcidae, n = 5) in houses, old fields and forests around Lexington (KY, USA). As we wanted to maximize the body size range as much as possible within the Araneomorphae (modern) spiders, we used individuals of various instars (as in Moya-Laraño et ...
... n = 25; Thomisidae, n = 4; Theridiidae, n = 13 and Pholcidae, n = 5) in houses, old fields and forests around Lexington (KY, USA). As we wanted to maximize the body size range as much as possible within the Araneomorphae (modern) spiders, we used individuals of various instars (as in Moya-Laraño et ...
[edit] Introduction
... number, single or minimum number of variables. The procedure is to form a hypothesis or prediction about what you believe or expect to see and then do everything you can to violate that, or falsify the hypotheses. Although this may seem unintuitive, the process serves to establish more firmly what i ...
... number, single or minimum number of variables. The procedure is to form a hypothesis or prediction about what you believe or expect to see and then do everything you can to violate that, or falsify the hypotheses. Although this may seem unintuitive, the process serves to establish more firmly what i ...
Ecology, sexual selection and speciation
... are one-trait vs. two-trait (Fry 2003), single-variation vs. doublevariation (Rice & Hostert 1993) and magic vs. indicator mechanisms (Servedio 2008): either a single, ÔmagicÕ, trait (Gavrilets 2004) is under divergent natural selection and also determines non-random mating, or non-random mating and ...
... are one-trait vs. two-trait (Fry 2003), single-variation vs. doublevariation (Rice & Hostert 1993) and magic vs. indicator mechanisms (Servedio 2008): either a single, ÔmagicÕ, trait (Gavrilets 2004) is under divergent natural selection and also determines non-random mating, or non-random mating and ...
Flatworms Phylum: PLATYHELMINTHES
... • The flatworms move across a surface using cilia on their ventral surface • They can also move by contracting circular and longitudinal muscles that lay just below the ectoderm. These muscles are controlled by the nerve cords. ...
... • The flatworms move across a surface using cilia on their ventral surface • They can also move by contracting circular and longitudinal muscles that lay just below the ectoderm. These muscles are controlled by the nerve cords. ...
Earth and Moon Jeopardy Review
... Condition where stool remains in the colon too long causing excessive reabsorption of water What is constipation? ...
... Condition where stool remains in the colon too long causing excessive reabsorption of water What is constipation? ...
Why do sperm carry RNA? Relatedness, conflict
... genotype [36]. Hence, there is potential for directly displaying attributes that signal relatedness or shared genes, and differences in miRNA expression are associated with different sperm phenotypes [9]; thus, it is plausible that sperm phenotypes could reveal information about sperm relatedness. C ...
... genotype [36]. Hence, there is potential for directly displaying attributes that signal relatedness or shared genes, and differences in miRNA expression are associated with different sperm phenotypes [9]; thus, it is plausible that sperm phenotypes could reveal information about sperm relatedness. C ...
effects of natural and sexual selection on adaptive population
... et al. 2004). This is partly a result of interspecific antagonistic male-male interactions in sympatry: here small-patched C. splendens males are favored because they are attacked less frequently by C. virgo males (Tynkkynen et al. 2004, 2005). Finally, comparisons of wing remnants of C. splendens m ...
... et al. 2004). This is partly a result of interspecific antagonistic male-male interactions in sympatry: here small-patched C. splendens males are favored because they are attacked less frequently by C. virgo males (Tynkkynen et al. 2004, 2005). Finally, comparisons of wing remnants of C. splendens m ...
it`s all about sex: bioluminescent courtship displays, morphological
... genus) and tooth, which emerge from the cleft of the inner lobe, and perhaps 3) limb length (Cohen and Morin, 2010). Sexual dimorphism is obvious in the valves, eye size, first antennae, and eighth limbs, but is also present in the second antennae, fifth and seventh limbs, and probably in the upper ...
... genus) and tooth, which emerge from the cleft of the inner lobe, and perhaps 3) limb length (Cohen and Morin, 2010). Sexual dimorphism is obvious in the valves, eye size, first antennae, and eighth limbs, but is also present in the second antennae, fifth and seventh limbs, and probably in the upper ...
Psychodynamics of Hypersexuality in Children and Adolescents with Bipolar Disorder Stewart Adelson
... The symptom of hypersexuality has recently emerged as an important issue in efforts to adapt the criteria of bipolar disorder to children and adolescents. Several psychiatric disorders that were once thought to affect only adults, such as major depression and schizophrenia, are now known to affect c ...
... The symptom of hypersexuality has recently emerged as an important issue in efforts to adapt the criteria of bipolar disorder to children and adolescents. Several psychiatric disorders that were once thought to affect only adults, such as major depression and schizophrenia, are now known to affect c ...
Sexual reproduction
Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm. Each gamete contains half the number of chromosomes of normal cells. They are created by a specialized type of cell division, which only occurs in eukaryotic cells, known as meiosis. The two gametes fuse during fertilization to produce DNA replication and the creation of a single-celled zygote which includes genetic material from both gametes. In a process called genetic recombination, genetic material (DNA) joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information. Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents, though self-fertilization can occur. For instance, in human reproduction each human cell contains 46 chromosomes, 23 pairs, except gamete cells, which only contain 23 chromosomes, so the child will have 23 chromosomes from each parent genetically recombined into 23 pairs. Cell division initiates the development of a new individual organism in multicellular organisms, including animals and plants, for the vast majority of whom this is the primary method of reproduction. A species is defined as a taxonomic rank. A species is often defined as the largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction, although the species problem encompasses a series of difficult related questions that often come up when biologists define the word species. The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation. This 50% cost is a fitness disadvantage of sexual reproduction. The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. One definite advantage of sexual reproduction is that it prevents the accumulation of genetic mutations.Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction. It has been described as ""a powerful evolutionary force that does not exist in asexual populations""Prokaryotes reproduce through asexual reproduction but may display processes similar to sexual reproduction (mechanisms for lateral gene transfer such as bacterial conjugation, transformation and transduction), but they do not lead to reproduction. In prokaryotes, the initial cell has additional or transformed genetic material.