questionsmedicales.fr
Phénomènes biologiques
Évolution biologique
Dérive génétique
Dérive génétique : Questions médicales fréquentes
Termes MeSH sélectionnés :
Physical Functional Performance
Diagnostic
5
Dérive génétique
Génétique des populations
Séquençage génétique
Marqueurs génétiques
Diversité génétique
Indices de diversité
Bioinformatique
Analyse génétique
Génétique des populations
Isolement génétique
Symptômes
5
Santé des populations
Évolution
Maladies génétiques
Épidémiologie
Traits génétiques
Évolution
Fertilité
Diversité génétique
Populations isolées
Traits spécifiques
Prévention
5
Prévention
Diversité génétique
Réserves naturelles
Biodiversité
Élevage sélectif
Diversité génétique
Programmes de conservation
Biodiversité
Migration
Génétique des populations
Traitements
5
Conservation
Diversité génétique
Reproduction contrôlée
Gestion de la biodiversité
Thérapie génique
Maladies génétiques
Sélection naturelle
Fréquences alléliques
Complications
5
Complications
Maladies héréditaires
Extinction
Diversité génétique
Populations en danger
Vulnérabilité
Adaptation
Changements environnementaux
Santé publique
Prévalence des maladies
Facteurs de risque
5
Taille de population
Isolement géographique
Événements fondateurs
Diversité génétique
Changement climatique
Isolement
Agriculture intensive
Diversité génétique
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"@type": "Question",
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"position": 8,
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"@type": "Question",
"name": "La dérive génétique affecte-t-elle la fertilité ?",
"position": 9,
"acceptedAnswer": {
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{
"@type": "Question",
"name": "Les populations isolées montrent-elles des symptômes ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles peuvent présenter des traits spécifiques dus à la dérive génétique."
}
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{
"@type": "Question",
"name": "Comment prévenir la dérive génétique ?",
"position": 11,
"acceptedAnswer": {
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"text": "Favoriser la diversité génétique par des échanges entre populations peut aider."
}
},
{
"@type": "Question",
"name": "Les réserves naturelles aident-elles ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles préservent la diversité génétique et limitent la dérive dans les populations."
}
},
{
"@type": "Question",
"name": "L'élevage sélectif est-il efficace ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "L'élevage sélectif peut réduire les effets de la dérive en maintenant la diversité."
}
},
{
"@type": "Question",
"name": "Les programmes de conservation sont-ils utiles ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils aident à maintenir la diversité génétique et à prévenir la dérive."
}
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{
"@type": "Question",
"name": "La migration des espèces aide-t-elle ?",
"position": 15,
"acceptedAnswer": {
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"text": "Oui, la migration peut introduire de nouveaux gènes et réduire la dérive."
}
},
{
"@type": "Question",
"name": "Y a-t-il des traitements pour la dérive génétique ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Il n'existe pas de traitements, car c'est un processus évolutif naturel."
}
},
{
"@type": "Question",
"name": "Comment gérer les effets de la dérive génétique ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "La gestion passe par la conservation de la diversité génétique dans les populations."
}
},
{
"@type": "Question",
"name": "Peut-on prévenir la dérive génétique ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "On peut réduire ses effets par des programmes de reproduction contrôlée."
}
},
{
"@type": "Question",
"name": "Les thérapies géniques aident-elles ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les thérapies géniques ne ciblent pas la dérive génétique, mais des maladies spécifiques."
}
},
{
"@type": "Question",
"name": "La sélection naturelle peut-elle contrer la dérive ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, la sélection naturelle peut influencer les fréquences alléliques et contrer la dérive."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "La dérive peut entraîner une perte de diversité génétique et des maladies héréditaires."
}
},
{
"@type": "Question",
"name": "La dérive génétique augmente-t-elle le risque d'extinction ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elle peut accroître le risque d'extinction des populations en réduisant la diversité."
}
},
{
"@type": "Question",
"name": "Les populations en danger sont-elles plus affectées ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les populations en danger sont plus vulnérables à la dérive génétique."
}
},
{
"@type": "Question",
"name": "La dérive peut-elle affecter l'adaptation ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elle peut limiter l'adaptation des populations aux changements environnementaux."
}
},
{
"@type": "Question",
"name": "Y a-t-il des effets sur la santé publique ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, la dérive peut influencer la prévalence de certaines maladies dans les populations."
}
},
{
"@type": "Question",
"name": "Quels facteurs augmentent la dérive génétique ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les petites tailles de population et l'isolement géographique augmentent le risque."
}
},
{
"@type": "Question",
"name": "Les événements fondateurs influencent-ils ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les événements fondateurs peuvent réduire la diversité génétique et favoriser la dérive."
}
},
{
"@type": "Question",
"name": "Le changement climatique est-il un facteur ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, il peut isoler des populations et augmenter la dérive génétique."
}
},
{
"@type": "Question",
"name": "Les maladies peuvent-elles influencer la dérive ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les épidémies peuvent réduire la taille de la population et favoriser la dérive."
}
},
{
"@type": "Question",
"name": "Les pratiques agricoles affectent-elles la dérive ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'agriculture intensive peut réduire la diversité génétique et favoriser la dérive."
}
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Expert en Médecine, Optimisation des Parcours de Soins et Révision Médicale
Validation scientifique effectuée le 26/03/2025
Contenu vérifié selon les dernières recommandations médicales
3 publications dans cette catégorie
Affiliations :
Department of Biology, Emory University, Atlanta, GA, 30322.
Emory Center of Excellence for Influenza Research and Response (Emory-CEIRR).
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Bobo Dioulasso, Burkina Faso.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.
Nuffield Department of Medicine, University of Oxford, Oxford, UK.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Laboratoire de Biometrie et Biologie Evolutive, CNRS, Universite Lyon 1, Villeurbanne, France.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Laboratoire de Biometrie et Biologie Evolutive, CNRS, Universite Lyon 1, Villeurbanne, France.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Laboratoire de Biometrie et Biologie Evolutive, CNRS, Universite Lyon 1, Villeurbanne, France.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Departments of Physics and Integrative Biology, University of California, Berkeley, CA, 94720, USA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Population Biology, University of California, Davis, CA 95616.
Department of Evolution and Ecology, University of California, Davis, CA 95616.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Center for Population Biology, University of California, Davis, CA 95616.
Department of Evolution and Ecology, University of California, Davis, CA 95616.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Department of Microbiology and Immunology, Emory University, Atlanta, GA, 30322.
Department of Biology, Emory University, Atlanta, GA, 30322.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, 30322.
Publications dans "Dérive génétique" :
2 publications dans cette catégorie
Affiliations :
Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA.
Publications dans "Dérive génétique" :
Multiple sclerosis (MS) typically has its onset in early and middle adulthood, but the population is steadily becoming more dominated by older adults. One of the primary consequences of both MS and ag...
The study involved secondary analysis of cross-sectional data from multiple studies. Ambulatory adults with MS who were relapse-free for the last 30 days were recruited, and controls were recruited ba...
The two-way ANOVA indicated a main effect of MS status (F(5,500)=34.74, p<.01, η...
Overall, MS status and aging have additive effects on physical function, and the summary SPPB score may be driven by a specific component within each age group. SPPB scores may be driven more by mobil...
To investigate whether a multi-item performance outcome measure, the physical performance test (PPT), can be calibrated to a common scale with patient-reported outcome measures, using the Patient-Repo...
We analyzed baseline data (N = 1,113) from the CONVINCE study, an international trial in end-stage kidney disease patients comparing high-dose hemodiafiltration with high-flux hemodialysis. Assumption...
Although some evidence for multidimensionality was found, classical test statistics (Cronbach's Alpha = 0.93), Mokken (Loevinger's H = 0.50), and bifactor analysis (explained common variance = 0.65) i...
We found preliminary evidence that the PPT can be linked to the PROMIS PF metric in hemodialysis patients, enabling group comparisons across patient-reported outcome and performance outcome measures. ...
Children with Juvenile Idiopathic Arthritis (JIA) may adopt different movement patterns and participate in physical activity during different states of disease....
Which specific features of gait and physical function performance differ among children with active or inactive JIA compared to healthy children?...
Forty-three children participated (14.5 ± 4.2 yrs; 60 % female). 3D-motion analysis methods were coupled with force measures from an instrumented treadmill captured gait mechanical measures. The 30-se...
Compared to healthy controls children with active and inactive JIA had worse outcomes (12-21 % slower self-selected and fast walking speeds, 28-34 % slower stair navigation times, 28 % fewer chair ris...
Gait speed, specific load-bearing functional tasks and leg stiffness features of gait may be informative 'functional biomarkers' for assessing JIA burden and tracking treatment efficacy. Additional pr...
The aim of this study was twofold: (i) to observe the individual results of fitness status [countermovement jump (CMJ)], hop test, linear sprinting time, stride frequency, stride distance, force-power...
The study followed a cohort design. Sixteen female soccer players competing in the second division of the Spanish league were monitored during the first days of the pre-season. These players were eval...
To examine the selective influences of changes in walking test capability on physical functional performance (COD speed, COD deficit, linear sprint speed, chair stand test, handgrip strength, and unlo...
The performances of eighty women ((age, 64.7 ± 3.38 y; body mass, 66.3 ± 11.15 kg; height, 153.5 ± 5.71 cm, BMI, 28.08 ± 4.00 kg/m...
Strength and conditioning coaches and professionals involved with older women should consider the COD deficit (i.e., linear velocity minus change of direction velocity), as a complementary measure to ...
History of chronic kidney disease and kidney transplantation is known to influence physical performance capacity. The aim of this study was to compare the physical performance of pediatric kidney tran...
Twenty-four pediatric kidney transplant recipients (62.5% boys) were tested at a median age of 10.8 years. Physical performance capacity was tested with a test set including six different components a...
The physical performance capacity in pediatric kidney transplant recipients was lower compared to healthy controls. Surprisingly, no statistically significant correlation was found between graft funct...
The physical performance of pediatric kidney transplant recipients is reduced, especially in those with congenital nephrotic syndrome. Clinical parameters, including graft function, did not predict ph...
The Short Physical Performance Battery (SPPB) is a commonly used tool to assess lower extremity function, composed of three assessments (standing balance, gait speed, and chair stand). While its valid...
In individuals with transtibial amputation, the distal part of the lower extremity is lost. Therefore, the knee joint is of greater importance to be able to provide physical performance. The aim of th...
The study included 21 subjects with transtibial amputation. A digital inclinometer was used to evaluate the joint position sense of the amputated side knee joint. The timed up and go test, the 4-squar...
The mean age of the participants was 52.52 ± 15.68 years. The mean of the error in knee joint position sense was 5.33 degree (standard deviation = 3.08 degree). The error in knee joint position sense ...
The knee joint position sense on the amputated side was found to be associated with physical functional performance in individuals with transtibial amputation. Residual limb knee joint position sense ...
In recent years, there has been a significant increase in the survival rates of cancer patients. However, this has also led to an increase in side effects, such as dyspnoea, which can negatively impac...
Experimental, prospective, longitudinal, randomised study with a parallel fixed-assignment scheme (CG-IG). The patients were selected from the Medical Oncology Service of the University Hospital Compl...
The study sample consisted of 182 patients, with 12 excluded, resulting in a final sample size of n = 170. Sex distribution (CG: 52.9% male and 47.1% female; IG: 49.4% male and 50.6% female). The prim...
The results of this study support the beneficial effects of an exercise re-education programme, carried out by an interdisciplinary team in improving the autonomy of oncology patients with dyspnoea....
The clinical trial was registered in ClinicalTrials.gov (NCT04186754). (03 September 2019)....
The safety and efficacy of long-term exercise training in reducing physical functional loss in older adults with advanced CKD and comorbidity is uncertain....
Multicenter, parallel group, randomized controlled trial....
Adults 55 years and older with estimated glomerular filtration rate (eGFR) of 15 to <45 mL/min/1.73 m...
Twelve months of in-center supervised exercise training incorporating majority aerobic but also muscle strengthening activities or a group health education control intervention, randomly assigned in 1...
Primary outcomes were cardiorespiratory fitness and submaximal gait at 6 and 12 months quantified by peak oxygen consumption (Vo...
Among 99 participants, the mean age was 68 years, 62% were African American, and the mean eGFR was 33 mL/min/1.73 m...
Planned sample size was not reached. Loss to follow-up and dropout were greater than anticipated....
Among adults aged ≥55 years with CKD stages 3b-4 and a high level of medical comorbidity, a 12-month program of in-center aerobic and resistance exercise training was safe and associated with improvem...
Government grants (National Institutes of Health)....
Registered at ClinicalTrials.gov with study number NCT01462097....