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Sexy Son Hypothesis
The sexy son hypothesis in evolutionary biology and sexual selection, proposed by Patrick J. Weatherhead and Raleigh J. Robertson of Queen's University in Kingston, Ontario in 1979, states that a female's ideal mate choice among potential mates is one whose genes will produce males with the best chance of reproductive success. This implies that other benefits the father can offer the mother or offspring are less relevant than they may appear, including his capacity as a parental caregiver, territory and any nuptial gifts. Fisher's principle means that the sex ratio (except in certain eusocial insects) is always near 1:1 between males and females, yet what matters most are her "sexy sons'" future breeding successes, more likely if they have a promiscuous father, in creating large numbers of offspring carrying copies of her genes. This sexual selection hypothesis has been researched in species such as the European pied flycatcher. Context Female mating preferences are widely r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ficedula Hypoleuca -Wood Of Cree Nature Reserve, Scotland -male-8a
The ''Ficedula'' flycatchers are a genus of Old World flycatchers. The genus is the largest in the family, containing around thirty species. They have sometimes been included in the genus ''Muscicapa''. The genus is found in Europe, Asia and Africa. Several species are highly migratory, whereas other species are sedentary. Taxonomy and systematics The genus was introduced by the French naturalist Mathurin Jacques Brisson in 1760 with the European pied flycatcher (''Ficedula hypoleuca'') as the type species. The genus name is from Latin and refers to a small fig-eating bird (''ficus'', "fig") supposed to change into the Eurasian blackcap, blackcap in winter. Extant species The genus contains the following species: Former species Formerly, some authorities also considered the following species (or subspecies) as species within the genus ''Ficedula'': * Indian black-naped blue monarch (as ''Siphia Styani'') Speciation A 2015 study on genomic pattern of differentiation, also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insect
Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, Thorax (insect anatomy), thorax and abdomen (insect anatomy), abdomen), three pairs of jointed Arthropod leg, legs, compound eyes, and a pair of antenna (biology), antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. The insect nervous system consists of a insect brain, brain and a ventral nerve cord. Most insects reproduce Oviparous, by laying eggs. Insects Respiratory system of insects, breathe air through a system of Spiracle (arthropods), paired openings along their sides, connected to Trachea#Invertebrates, small tubes that take air directly to the tissues. The blood therefore does not carry oxygen; it is only partly contained in ves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allele
An allele is a variant of the sequence of nucleotides at a particular location, or Locus (genetics), locus, on a DNA molecule. Alleles can differ at a single position through Single-nucleotide polymorphism, single nucleotide polymorphisms (SNP), but they can also have insertions and deletions of up to several thousand base pairs. Most alleles observed result in little or no change in the function or amount of the gene product(s) they code or regulate for. However, sometimes different alleles can result in different observable phenotypic traits, such as different pigmentation. A notable example of this is Gregor Mendel's discovery that the white and purple flower colors in pea plants were the result of a single gene with two alleles. Nearly all multicellular organisms have two sets of chromosomes at some point in their biological life cycle; that is, they are diploid. For a given locus, if the two chromosomes contain the same allele, they, and the organism, are homozygous with re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heritability
Heritability is a statistic used in the fields of Animal husbandry, breeding and genetics that estimates the degree of ''variation'' in a phenotypic trait in a population that is due to genetic variation between individuals in that population. The concept of heritability can be expressed in the form of the following question: "What is the proportion of the variation in a given trait within a population that is ''not'' explained by the environment or random chance?" Other causes of measured variation in a trait are characterized as environment (biophysical), environmental factors, including observational error. In human studies of heritability these are often apportioned into factors from "shared environment" and "non-shared environment" based on whether they tend to result in persons brought up in the same household being more or less similar to persons who were not. Heritability is estimated by comparing individual phenotypic variation among related individuals in a population, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trends (journals)
''Trends'' is a series of 16 review journals in a range of areas of biology and chemistry published under its Cell Press imprint by Elsevier Elsevier ( ) is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as ''The Lancet'', ''Cell (journal), Cell'', the ScienceDirect collection of electronic journals, .... The publisher in lieu is Danielle Loughlin. The ''Trends'' series was established in 1976 with ''Trends in Biochemical Sciences'', rapidly followed by ''Trends in Neurosciences'', ''Trends in Pharmacological Sciences'', and ''Immunology Today''. ''Immunology Today'', ''Parasitology Today'', and ''Molecular Medicine Today'' changed their names to ''Trends in...'' in 2001. '' Drug Discovery Today'' was spun off as an independent brand. Titles The current set of ''Trends'' journals are all published monthly: References External links * Academic journal series Cell Press academic jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchor Books
Vintage Books is a trade paperback publishing imprint of Penguin Random House originally established by Alfred A. Knopf in 1954. The company was acquired by Random House in April 1960, and a British division was set up in 1990. After Random House merged with Bantam Doubleday Dell, Doubleday's Anchor Books trade paperback line was added to the same division as Vintage. Following Random House's merger with Penguin, Vintage UK was transferred to Penguin UK. In addition to publishing classic and contemporary works in paperback under the Vintage brand, the imprint also oversees the sub-imprints Bodley Head, Jonathan Cape, Chatto and Windus, Harvill Secker, Hogarth Press, Square Peg, and Yellow Jersey. Vintage began publishing some titles in the mass-market paperback format in 2003. Notable authors * Albert Camus * Robert Caro * Joan Didion * Dave Eggers * Ralph Ellison * James Ellroy * William Faulkner * Dashiell Hammett * Jane Jacobs * Gabriel Garcia Marquez * Cormac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Genetical Theory Of Natural Selection
''The Genetical Theory of Natural Selection'' is a book by Ronald Fisher which combines Mendelian inheritance, Mendelian genetics with Charles Darwin's theory of natural selection, with Fisher being the first to argue that "Mendelism therefore validates Darwinism" and stating with regard to mutations that "The vast majority of large mutations are deleterious; small mutations are both far more frequent and more likely to be useful", thus refuting orthogenesis. First published in 1930 by Oxford University Press#Clarendon Press, The Clarendon Press, it is one of the most important books of the Modern synthesis (20th century), modern synthesis, and helped define population genetics. It had been described by James F. Crow, J. F. Crow as the "deepest book on evolution since Darwin". It is commonly cited in biology books, outlining many concepts that are still considered important such as Fisherian runaway, Fisher's principle, Reproductive value (population genetics), reproductive value, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Selfish Gene
''The Selfish Gene'' is a 1976 book on evolution by ethologist Richard Dawkins that promotes the gene-centred view of evolution, as opposed to views focused on the organism and the group. The book builds upon the thesis of George C. Williams's '' Adaptation and Natural Selection'' (1966); it also popularized ideas developed during the 1960s by W. D. Hamilton and others. From the gene-centred view, it follows that the more two individuals are genetically related, the more sense (at the level of the genes) it makes for them to behave cooperatively with each other. A lineage is expected to evolve to maximise its inclusive fitness—the number of copies of its genes passed on globally (rather than by a particular individual). As a result, populations will tend towards an evolutionarily stable strategy. The book also introduces the term ''meme'' for a unit of human cultural evolution analogous to the gene, suggesting that such "selfish" replication may also model human cult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Dawkins
Richard Dawkins (born 26 March 1941) is a British evolutionary biology, evolutionary biologist, zoologist, science communicator and author. He is an Oxford fellow, emeritus fellow of New College, Oxford, and was Simonyi Professor for the Public Understanding of Science, Professor for Public Understanding of Science at the University of Oxford from 1995 to 2008, and is on the advisory board of the University of Austin. His book ''The Selfish Gene'' (1976) popularised the gene-centred view of evolution and coined the word ''meme''. Dawkins has won several academic and writing awards. A vocal Atheism, atheist, Dawkins is known for his criticism of creationism and intelligent design. He wrote ''The Blind Watchmaker'' (1986), in which he argues against the watchmaker analogy, an argument for the existence of a creator deity based upon the Evolution of biological complexity, complexity of living organisms. Instead, he describes evolutionary processes as analogous to a ''blind'' watc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ronald Fisher
Sir Ronald Aylmer Fisher (17 February 1890 – 29 July 1962) was a British polymath who was active as a mathematician, statistician, biologist, geneticist, and academic. For his work in statistics, he has been described as "a genius who almost single-handedly created the foundations for modern statistical science" and "the single most important figure in 20th century statistics". In genetics, Fisher was the one to most comprehensively combine the ideas of Gregor Mendel and Charles Darwin, as his work used mathematics to combine Mendelian genetics and natural selection; this contributed to the revival of Darwinism in the early 20th-century revision of the theory of evolution known as the Modern synthesis (20th century), modern synthesis. For his contributions to biology, Richard Dawkins declared Fisher to be the greatest of Darwin's successors. He is also considered one of the founding fathers of Neo-Darwinism. According to statistician Jeffrey T. Leek, Fisher is the most in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Princeton University Press
Princeton University Press is an independent publisher with close connections to Princeton University. Its mission is to disseminate scholarship within academia and society at large. The press was founded by Whitney Darrow, with the financial support of Charles Scribner, as a printing press to serve the Princeton community in 1905. Its distinctive building was constructed in 1911 on William Street in Princeton. Its first book was a new 1912 edition of John Witherspoon's ''Lectures on Moral Philosophy.'' History Princeton University Press was founded in 1905 by a recent Princeton graduate, Whitney Darrow, with financial support from another Princetonian, Charles Scribner II. Darrow and Scribner purchased the equipment and assumed the operations of two already existing local publishers, that of the ''Princeton Alumni Weekly'' and the Princeton Press. The new press printed both local newspapers, university documents, '' The Daily Princetonian'', and later added book publishing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secondary Sex Characteristic
A secondary sex characteristic is a physical characteristic of an organism that is related to or derived from its sex, but not directly part of its reproductive system. In humans, these characteristics typically start to appear during puberty—and include enlarged breasts and widened hips of females, facial hair and Adam's apples on males, and pubic hair on both. In non-human animals, they can start to appear at sexual maturity—and include, for example, the manes of male lions, the bright facial and rump coloration of male mandrills, and horns in many goats and antelopes. Secondary sex characteristics are particularly evident in the sexually dimorphic phenotypic traits that distinguish the sexes of a species. In evolution, secondary sex characteristics are the product of sexual selection for traits that show fitness, giving an organism an advantage over its rivals in courtship and in aggressive interactions. Many characteristics are believed to have been establishe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
