Video Experimental Relacionado
Updated: Apr 16, 2026
09:45
Mosaic Zebrafish Transgenesis for Functional Genomic Analysis of Candidate Cooperative Genes in Tumor Pathogenesis
Published on: March 31, 2015
11.3K
Consecuencias del cáncer en el pez cebra: información sobre la determinación del sexo, la proporción de sexos y la
Justine Boutry1, Mathieu Douhard2, Klara Asselin1
1CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches IRD 224-CNRS 5290-Université de Montpellier Montpellier France.
Ecology and evolution
|September 3, 2025
Resumen
El cáncer de piel en el pez cebra no afecta la proporción de sexo de la descendencia. Sin embargo, la supervivencia de la descendencia fue mayor en las madres con cáncer, lo que sugiere una mayor asignación de recursos para la reproducción en las hembras enfermas.
Área de la Ciencia:
- Ecología
- Biología evolutiva
- La genética
Sus antecedentes:
- La proporción de sexo de la descendencia es un indicador potencial del riesgo de cáncer, pero también puede ser una consecuencia de la enfermedad.
- Investigar las interacciones huésped-tumor es crucial para comprender los impactos ecológicos y evolutivos.
Objetivo del estudio:
- Determinar si el cáncer de piel en etapa temprana influye en la determinación del sexo y la mortalidad en el pez cebra (Danio rerio).
- Evaluar si las hembras de pez cebra portadoras de tumores producen crías con una proporción de sexos diferente a la de las hembras sanas.
- Para comparar las tasas de supervivencia de la descendencia de las hembras de pez cebra cancerosas frente a las no cancerosas.
Principales métodos:
- Inducción de cáncer de piel en embriones de pez cebra.
- Analizando la determinación del sexo y la mortalidad por sexo específico.
- Comparación de las relaciones sexuales de la descendencia y las tasas de supervivencia entre las hembras adultas portadoras de tumores y las sanas.
Principales resultados:
- La inducción del cáncer de piel no influyó en la determinación del sexo ni en la proporción de sexo de la descendencia de pez cebra.
- La supervivencia de la descendencia hasta la madurez sexual fue mayor cuando fue producida por madres cancerosas.
- Las hembras enfermas parecen asignar más recursos a los esfuerzos reproductivos actuales.
Conclusiones:
- El cáncer de piel del pez cebra no altera la determinación del sexo de la cría ni la relación de sexos.
- El aumento de la supervivencia de la descendencia de las madres con cáncer sugiere un intercambio de asignación de recursos maternos.
- Este estudio proporciona información sobre las consecuencias ecológicas y evolutivas de las interacciones huésped-tumor.
Videos de Conceptos Relacionados
02:27Background and Environment Affect Phenotype
8.2K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
8.2K
02:45The Ratio of X Chromosome to Autosomes
10.2K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
10.2K
02:50Dosage Compensation
8.0K
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
8.0K
01:21Nondisjunction
5.9K
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
5.9K
01:11Testing a Claim about Mean: Known Population SD
3.5K
A complete procedure of testing the hypothesis about a population mean is explained here.
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
3.5K
01:21Cancer Survival Analysis
853
Cancer survival analysis focuses on quantifying and interpreting the time from a key starting point, such as diagnosis or the initiation of treatment, to a specific endpoint, such as remission or death. This analysis provides critical insights into treatment effectiveness and factors that influence patient outcomes, helping to shape clinical decisions and guide prognostic evaluations. A cornerstone of oncology research, survival analysis tackles the challenges of skewed, non-normally...
853