• Different animal species have various mechanisms for controlling differentiation between males and females, commonly involving 'sex factors' coded for by genes on sex chromosomes. (andrewgray.com)
  • An interesting variation on this is seen in certain crustaceans, in which sex determination is influenced not only by sex chromosomes but also by the presence or absence of intracellular symbionts such as the bacterium Wolbachia . (andrewgray.com)
  • Gender in these woodlice is dictated by the presence of Z and W sex chromosomes: ZZ in males and ZW in females. (andrewgray.com)
  • Sex skewing can be achieved in a number of different ways - by varying which chromosomes are passed on in species with chromosomal sex determination, or by varying incubation temperature in species with temperature-dependent sex determination, or even by selective reabsorption of embryos of the "unwanted" sex in species such as mammals that develop internally. (theconversation.com)
  • Having too many or too few sex chromosomes results in several more or less clear characteristics. (sciencenews.dk)
  • Claus Højbjerg Gravholt's research group previously investigated whether too many or too few sex chromosomes can affect the regulation of signalling pathways and proteins body through methylation, in which small methyl groups are added to the DNA and thereby regulate the function of genes. (sciencenews.dk)
  • Turner Syndrome Turner syndrome is a sex chromosome abnormality in which girls are born with one of their two X chromosomes partially or completely missing. (merckmanuals.com)
  • Within the spectrum of DSD, there are varying degrees of discordant genitalia to sex chromosomes. (medscape.com)
  • In a small proportion of genotypically-male, Wolbachia -infected individuals, feminisation is incomplete and results in the development of sterile, intersexual animals possessing features of both sexes. (andrewgray.com)
  • pseudohermaphroditism , a condition in which the individual has a single chromosomal and gonadal sex but combines features of both sexes in the external genitalia , causing doubt as to the true sex. (britannica.com)
  • In host populations where either sex or self-fertilization were possible, the evolutionary state of the parasite determined the most effective reproductive strategy. (phys.org)
  • Fibromas are most often observed in adults, but they may occur in individuals of any age and either sex. (medscape.com)
  • Feminising factors that distort the sex ratio lead to intragenomic conflict, since Fisherian selection acting on the autosomal genes of the host favours an overall sex ratio of 1:1. (andrewgray.com)
  • This is the so-called " Fisherian " sex ratio. (theconversation.com)
  • Many genes on the Y chromosome are involved in male sex determination and development. (medlineplus.gov)
  • This kind of 'cytoplasmic sex determination' involving intracellular symbionts is found in various other crustacean families. (andrewgray.com)
  • However, cytoplasmic sex determination is not known in any other animal group (with the possible exception of certain insects and aphids), and it has therefore been suggested that the sex-determining machinery of isopod and amphipod crustaceans is uniquely vulnerable to being hijacked by symbionts. (andrewgray.com)
  • or by environmental factors, as in turtles where sex determination depends on the incubation temperature of the egg. (theconversation.com)
  • An intriguing twist to the story is the discovery of female-biased sex ratios, similar to those conferred by Wolbachia , in strains of A. vulgare that do not carry such symbionts. (andrewgray.com)
  • A simple prediction is that this causes sex ratios to converge on a stable 1:1 mix of males and females. (theconversation.com)
  • This means that natural selection should in principle ensure that offspring sex ratios remain equal or near-equal. (theconversation.com)
  • 17-Hydroxylase (17-OH) deficiency syndrome is a rare genetic disorder of steroid biosynthesis that causes decreased production of glucocorticoids and sex steroids and increased synthesis of mineralocorticoid precursors. (medscape.com)
  • At puberty, patients require sex steroid replacement for development of secondary sexual characteristics as well as cyclic menstrual bleeding in 46,XX females. (medscape.com)
  • Congenital adrenal hyperplasia (CAH) is a family of autosomal recessive disorders of adrenal steroid biosynthesis in which one of the enzymes necessary for cortisol production has deficient activity. (medscape.com)
  • It has been proposed that racial/ethnic variation in prostate cancer incidence may be, in part, due to racial/ethnic variation in sex steroid hormone levels. (cdc.gov)
  • However, it remains unclear whether in the US population circulating concentrations of sex steroid hormones vary by race/ethnicity. (cdc.gov)
  • The males may have small testicles, with associated reduced fertility and reduced testosterone production and sex drive. (sciencenews.dk)
  • is determined in men when reduced testosterone production is suspected, e.g. in hypogonadism, estrogen therapy, chromosome aberrations (as in the Klinefelter's syndrome) and liver cirrhosis. (cdc.gov)
  • In natural populations of A. vulgare , Wolbachia is relatively rare. (andrewgray.com)
  • Populations that have undergone recent bottlenecks are also characterized by an excess of mildly deleterious variants, which are derived from rare variants that stochastically increased in frequency after a bottleneck event 4 . (nature.com)
  • Sex allows parents to produce offspring that are more resistant to the parasites, while self-fertilization dooms populations to extinction at the hands of their biological enemies. (phys.org)
  • On the other hand, sex allowed populations to keep pace with their parasites. (phys.org)
  • Sex helped populations adapt to their coevolving parasites, allowing parents to produce offspring that were resistant to infection and ultimately avoid extinction ," he noted. (phys.org)
  • Secondary sex characteristics may never appear in some, whereas others may achieve a fully feminized appearance. (britannica.com)
  • Testosterone promotes the development of the secondary sex characteristics in men and serves to maintain the function of the prostate and seminal vesicles. (cdc.gov)
  • PWS occurs due to abnormalities affecting certain genes in the proximal long arm of chromosome 15 when deleted from the father's chromosome 15 and hence referred to as a genomic imprinting disorder which depends on the sex of the parent donating the chromosome leading to the chromosome defect in the child. (rarediseases.org)
  • Scientists have found that oysters contain certain rare amino acids that trigger production of sex hormones. (ehow.com)
  • Immune reactions can affect the pituitary, thyroid, pancreas, and adrenal glands, resulting in inflammation of these glands, which can affect their production of certain hormones. (oncolink.org)
  • For example, in the woodlouse Armadillidium vulgare (an isopod crustacean), females infected with Wolbachia symbionts produce a disproportionately high number of female offspring, whereas uninfected individuals produce offspring with the normal 1:1 sex ratio that would be expected from Mendelian genetics. (andrewgray.com)
  • This can result in selection for a male-biased sex ratio in lineages uninfected by the symbiont (to compensate for the excess of females), or lead to the evolution of 'male restorer' genes that allow infected individuals to resist the feminising effect exerted by their symbionts. (andrewgray.com)
  • Simply put, if there are more females than males in the population, then genes which favour the production of more male offspring will be favoured by evolution - and vice versa - since it will be easier for offspring of the rarer sex to find mates. (theconversation.com)
  • There aren't many lesbian and homosexual couples around, and those that do exist are equally rarer. (lunchbox-productions.com)
  • Yuri on Ice's representation of same-sex couples has been hailed as one of the best in animation history. (lunchbox-productions.com)
  • In contrast, cortisol synthesis and secretion is regulated by adrenocorticotropic hormone (ACTH), which stimulates the enzyme P-450scc (20, 22 desmolase) with subsequent increased production of all adrenal steroids in both the zona fasciculata and zona reticularis. (medscape.com)
  • Cortisol production is regulated by feedback with adrenocorticotropic hormone (ACTH). (medscape.com)
  • This disorder arises from an inherited defect in one of the enzymes needed for the production of cortisol , a hormone that plays a major role in the physiological response to stress . (britannica.com)
  • To address this, concentrations of testosterone, sex hormone binding globulin, androstanediol glucuronide (a metabolite of dihydrotestosterone) and estradiol were measured in stored serum specimens from men examined in the morning sample of the first phase of NHANES III (1988-1991). (cdc.gov)
  • Most of the circulating testosterone is bound to carrier proteins (SHBG = sex hormone-binding globulin). (cdc.gov)
  • Excessive amounts of adrenal androgens must be produced to overcome the decrease in cortisol production. (britannica.com)
  • Ovaries and ovarian portions of ovotestes appear normal and demonstrate follicular growth with estradiol production. (medscape.com)
  • These deletions remove several genes, or in rare cases, a single gene. (medlineplus.gov)
  • The Red Queen Hypothesis predicts that sex should allow hosts to evade infection from their parasites, whereas self-fertilization may increase the risk of infection," said co-author Curtis M. Lively. (phys.org)
  • However, when the parasite was allowed to coevolve with the hosts, then sex became the favored reproductive strategy. (phys.org)
  • Identifying variants that influence disease risk only in the homozygous state (recessive inheritance) is particularly challenging, as the square of variant frequencies means that the homozygous state is often exceedingly rare. (nature.com)
  • While this kind of move would later become more common, it was exceedingly rare for a musical at the time, and it was a particularly bold move for a musical with a nontraditional score. (history.com)
  • It is a well-known traditional herbal medicine that has historical use as an aphrodisiac to improve sex drive and for the age-related sexual symptoms of andropause. (netnutri.com)
  • Congenital lactase deficiency is an extremely rare autosomal recessive disorder associated with a complete absence of lactase expression. (medscape.com)
  • Male pseudohermaphroditism is rare and almost always results from autosomal recessive genetic defects (defects that must be inherited from both parents in order to be expressed). (britannica.com)
  • They stand for completenss including even the very rare species and vagrants which have only been recorded once or a few times in a region. (cnet.com)
  • Even the rare species are illustrated and described in detail featured with a full species account.No other bird app for this region offers the following:- Includes all 1,889 Colombian bird species- 5,600 illustrations from the Helm Guide Series "Birds of Northern South America" - All subspecies + geographic, age and sex variations- More than 4,000 bird songs and calls! (cnet.com)
  • Scientists at Nasa have announced the existence of a possible rare water ocean on a giant exoplanet scores of light years away and also a chemical hint of a sign of potential life. (yahoo.com)
  • PhysOrg.com) -- It seems we may have parasites to thank for the existence of sex as we know it. (phys.org)
  • The widespread existence of sex has been a major problem for evolutionary biology since the time of Charles Darwin ," said lead author Levi T. Morran. (phys.org)
  • The Red Queen Hypothesis provides one possible explanation for the existence of sex. (phys.org)
  • These results are consistent with the Red Queen Hypothesis and may go a long way toward explaining the widespread existence of sex. (phys.org)
  • Peter Ellis has received funding from the BBSRC and Leverhulme Trust to study the molecular genetics of sex ratio regulation. (theconversation.com)
  • Y chromosome infertility is a condition that affects the production of sperm and causes male infertility, which means it is difficult or impossible for affected men to father children. (medlineplus.gov)
  • what is an erect penis Male Enhancement Supplements Permanent Penis Enlargement sex on placebo birth control pills ECOWAS. (ecowas.int)
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  • In some industrialized countries where this condition is common and injuries and violence are rare, alcohol consumption may prevent about as many deaths as it causes in some segments of the population. (who.int)
  • Do Edibles Make You Last Longer In Bed and Does smoking weed lower your sex drive 2023-07-23 London Town Hotels . (london-town-hotels.com)
  • Users may enjoy immense benefits from the exclusive blend of rare ingredients in Alpha Max CBD Gummies, which reportedly help elevate testosterone levels and intensify sex drive, thus creating an unparalleled experience. (homernews.com)
  • Congenital forms of hypertrichosis are caused by genetic mutations, and are extremely rare, unlike acquired forms. (wikipedia.org)
  • It is a rare form of congenital adrenal hyperplasia (CAH) resulting from loss-of-function mutations involving the CYP17 gene. (medscape.com)
  • ACTH stimulates the enzyme P-450scc (20,22 desmolase), with subsequently increased production of all adrenal steroids. (medscape.com)
  • The adrenal glands undergo hypertrophy, apparently due to ACTH-stimulated production of insulinlike growth factor-2 (IGF-2). (medscape.com)
  • Circulating bacteria differ genotypically from strains used in production of pertussis vaccine. (cdc.gov)
  • People with the rare chromosome disorders Turner syndrome and Klinefelter syndrome differ in the expression of circular RNA. (sciencenews.dk)
  • The Near Mint disc has an EMI "Factory Sample NOT FOR SALE" sticker on the A-Side, and is the second variation with the correct Chris Thomas and Dave Goodman production credits. (recordmecca.com)
  • provide instructions for making proteins that are involved in sperm cell production and development, although the specific functions of these proteins are not well understood. (medlineplus.gov)
  • Loss of this genetic material likely prevents the production of one or more proteins needed for normal sperm cell development. (medlineplus.gov)
  • Those diagnosed with this rare condition represent a small fraction of patients within the diagnostic category of the disorders of sexual development (DSD), formerly known as intersex. (medscape.com)
  • Like birds, female avian-like dinosaurs probably had a layer of tissue called medullary bone inside some of the cavities of their skeleton which contributed calcium to egg production, providing one piece of evidence that could link other traits to a particular gender. (sciencealert.com)
  • Archives of Sexuality and Gender Digitized primary sources for the historical study of sex, sexuality, and gender. (csusb.edu)
  • These tumors occur in infants and young children and are rare in adults. (medlineplus.gov)
  • However, on rare occasions, an intermixture of these elements may occur. (medscape.com)
  • Sex does not make evolutionary sense, because it often involves the production of males. (phys.org)
  • However, due to their rarity, it is uncommon to make use of any Brussbar for meat production. (thankchickens.com)
  • Sex is culture in itself, but there's also a lot of valuable cultural information and imagery beyond the sexual content of these films that allows us a rare glimpse into queer life at that time. (ebar.com)
  • Most of the gene mutations involved in DICER1 syndrome lead to an abnormally short Dicer protein that is unable to aid in the production of miRNA. (medlineplus.gov)
  • Autosomal dominant hyper-IgE syndrome (AD-HIES), formerly known as Job syndrome, is a rare syndrome that includes the triad of eosinophilia, eczema, and recurrent skin and pulmonary infections. (medscape.com)
  • Unfortunately, until now, silver Brussbars chickens are extinct while the gold variety becomes very rare to find in the market. (thankchickens.com)
  • National Theatre Collection: Volumes 1 and 2 Streaming video of fifty filmed stage productions from Britain's National Theatre, plus supporting documents such as prompt scripts and costume bibles. (csusb.edu)
  • As an actress and entertainer, she has given over 200 performances of her solo shows, appeared at comedy clubs, at Caroline's on Broadway, primetime news shows, and HBO's Sex & The City , not to mention dozens of television commercials, including a Super Bowl spot. (speaking.com)
  • Not bad, since this important enzyme controls the cholesterol production rate. (netnutri.com)
  • MicroRNA is a type of RNA, a chemical cousin of DNA, that attaches to a protein's blueprint (a molecule called messenger RNA) and blocks the production of proteins from it. (medlineplus.gov)
  • So, nine years ago, the then-64-year-old retired engineer from Asbury, New Jersey, went to his local Ford dealer and put down $160,000 to buy the fastest and most expensive production car the company had ever built, the Ford GT. (forbesindia.com)
  • In recent years some constraints on production and trade and on consumption of alcohol have been weakened by increasing availability and accessibility of alcoholic beverages, leading to changes in drinking patterns across the globe. (who.int)
  • A rare promotional UK copy of the Sex Pistols debut single on EMI, Anarchy in the UK/I Wanna Be Me, with the rare original black picture sleeve. (recordmecca.com)
  • Sirenomelia is a very rare limb anomaly in which the normally paired lower limbs are replaced by a single midline limb. (cdc.gov)
  • Additionally, as an autosexing breed, it is easier to identify the sex of their chicks via their appearance when they hatch their eggs. (thankchickens.com)
  • Included in this experience was the rare distinction of being mentored by the legendary Marcel Marceau. (speaking.com)
  • Power cultivation was not good enough he would never become young czech girl takes a pill for better sex experience a super douluo in the future if he could not become a super douluo, he would not have the slightest chance to touch the. (ecowas.int)
  • Garrano is at first unconvinced, but becomes more suspicious when it turns out that Valenti's heiress wife was committed to an asylum after a rare condition caused her to go insane after having sex with her husband for the first time on their wedding night. (hysteria-lives.co.uk)
  • Gay porn films represent an early wave of queer independent film production in which LGBTQ filmmakers were actually telling their own stories and representing themselves on screen for the first time. (ebar.com)
  • And perhaps most impressively, Pronsato has a new album in the can for Foom Records ( Rare Normal, out this fall) that might be his best yet-and also a bold departure from the skewed dance-floor bangers that have brought him global acclaim. (madronalabs.com)
  • With only one mining firm currently producing rare earths in the US, Round Top-which the company hopes to have in operation by 2023-would play a significant role in helping diversify supplies. (dictionary.com)
  • The discovery enables researchers to learn about previously unknown aspects of these rare disorders. (sciencenews.dk)
  • Osteochondrodysplasias Osteochondrodysplasias are a group of rare hereditary disorders of connective tissue, bone, or cartilage that cause the skeleton to develop abnormally. (merckmanuals.com)
  • Although involvement of the oral cavity is rare, few cases of oral elastofibromas have been documented in the literature, presenting as asymptomatic submucosal and nodular masses involving the floor of the mouth and hard palate. (medscape.com)
  • We asked two prominent sexologists common questions about holiday hookups, breakups and sex etiquette. (yahoo.com)
  • Self-fertilization is a far more efficient means of reproduction, and as such, evolutionary theory predicts that self-fertilization should be widespread in nature and sex should be rare. (phys.org)
  • A high production volume chemical, quinoline is used to produce a variety of drugs and dyes. (cdc.gov)
  • By combining the DNA of two parents, sex allows parents to produce offspring that are genetically diverse and different from their parents. (phys.org)
  • Best known for his cerebral yet lubricious, off-kilter techno on a variety of elite labels, Pronsato lately has delved into hip-hop production with legendary Ultramagnetic MCs/Dr. Octagon rapper Kool Keith and rising underground MC/poet/musician Black Saturn. (madronalabs.com)
  • More information on the chemical and physical properties of silver compounds can be found in Chapter 3, on its production, use, and disposal in Chapter 4, and on silver in the environment in Chapters 4 and 5. (cdc.gov)