The spores are microscopic bodies of one or several cells which aims are the dispersion and the survival in adverse conditions. They are haploid cells, that is to say, they contain just one set of chromosomes of the normal number of chromosomes. This process is given in algae, fungi, ferns and some protozoa. On the other hand, reproductive cells such as mammals, including human beings, as the ova and the sperm, are not fertilized by themselves, they are also haploid cells till the moment of the fertilization. The gametes join during the conception and the fertilized ovum contains now a normal number of chromosomes, two sets: it becomes a diploid cell. Mother nature teach...
Organy generatywne uzyskanych w warunkach kultur in vitro regenerantów formy diploidalnej i haploida...
The early embryo is not a simple homogenous, undifferentiated tissue. The zygote (or unicellular pha...
By means of anther culture or isolated gametophyte culture, it is possible to control the microgamet...
106 p.-35 fig.En la naturaleza, el crecimiento vegetativo de S. pombe es normalmente haploide. Sólo ...
9 páginasThe objective of this article is to highlight the advantages of human reproduction from the...
Meiosis and karyogamy are recognized as control points in the life cycle of cryptogams. The control ...
Para la perpetuación de la vida se necesita de la reproducción, que se explica en el siguiente artíc...
Mestrado em Biologia dos Recursos Vegetais / Instituto Superior de Agronomia. Universidade de Lisboa...
Esta presentación expone las fases de la mitosis y de la meiosis y su importancia para la vida celu...
The ethical judgment on the matter dealing with producing a human clone for it to thrive and be bor...
Poliploidy to organizmy o zwielokrotnionej liczbie genomów. Mogą powstawać samorzutnie lub w wyniku ...
Resumen del trabajo presentado al International Symposium: Yeasts as versatile testbeds for the Life...
La poliploidía es una condición hereditaria consistente en la existencia de más de dos juegos de cro...
Les aneuploidies cromosómiques són la causa més comuna d'abortaments en nadons humans. L'origen d'aq...
Reproduction by division and cell death are two essential characteristics of living systems. Neverth...
Organy generatywne uzyskanych w warunkach kultur in vitro regenerantów formy diploidalnej i haploida...
The early embryo is not a simple homogenous, undifferentiated tissue. The zygote (or unicellular pha...
By means of anther culture or isolated gametophyte culture, it is possible to control the microgamet...
106 p.-35 fig.En la naturaleza, el crecimiento vegetativo de S. pombe es normalmente haploide. Sólo ...
9 páginasThe objective of this article is to highlight the advantages of human reproduction from the...
Meiosis and karyogamy are recognized as control points in the life cycle of cryptogams. The control ...
Para la perpetuación de la vida se necesita de la reproducción, que se explica en el siguiente artíc...
Mestrado em Biologia dos Recursos Vegetais / Instituto Superior de Agronomia. Universidade de Lisboa...
Esta presentación expone las fases de la mitosis y de la meiosis y su importancia para la vida celu...
The ethical judgment on the matter dealing with producing a human clone for it to thrive and be bor...
Poliploidy to organizmy o zwielokrotnionej liczbie genomów. Mogą powstawać samorzutnie lub w wyniku ...
Resumen del trabajo presentado al International Symposium: Yeasts as versatile testbeds for the Life...
La poliploidía es una condición hereditaria consistente en la existencia de más de dos juegos de cro...
Les aneuploidies cromosómiques són la causa més comuna d'abortaments en nadons humans. L'origen d'aq...
Reproduction by division and cell death are two essential characteristics of living systems. Neverth...
Organy generatywne uzyskanych w warunkach kultur in vitro regenerantów formy diploidalnej i haploida...
The early embryo is not a simple homogenous, undifferentiated tissue. The zygote (or unicellular pha...
By means of anther culture or isolated gametophyte culture, it is possible to control the microgamet...