Buscar
Mostrando ítems 1-10 de 388
Gamete quality in fish: evaluation parameters and determining factors
(CAMBRIDGE UNIV PRESS, 2015)
Ultrastructure of mature male gametes of Nitella hyalina (Charales, Charophyta)
(International Phycological Society, 2019-04-23)
This article describes the ultrastructure of male gametes of Nitella hyalina. Microtubular roots did not surround mitochondria completely. The number of microtubules varied from 12 to19 at the level of mitochondria, from ...
Segregation for Sexual Seed Production in Paspalum as Directed by Male Gametes of Apomictic Triploid Plants
(Oxford University Press, 2007-09)
Background and Aims: Gametophytic apomixis is regularly associated with polyploidy. It has been hypothesized that apomixis is not present in diploid plants because of a pleiotropic lethal effect associated with monoploid ...
Round‐Headed Spermatozoa: A Model to study the Role of the Acrosome in early events of Gamete Interaction: Rundkopfspermatozoen: Ein Modell zum Studium der Rolle des Akrosoms
(1990)
Summary: Gamete interactions in mouse involves at least two steps: the first is the interaction of a spermatozoa receptor located in the plasma membrane and ZP3, a zona pellucida (ZP) glycoprotein. ZP3 also can induce the ...
When genes move farther than offspring: gene flow by male gamete dispersal in the highly philopatric bat species Thyroptera tricolor
(2013-11)
For species characterized by philopatry of both sexes, mate selection represents an important behaviour for inbreeding avoidance, yet the implications for gene flow are rarely quantified. Here, we present evidence of male ...
When genes move farther than offspring: gene flow by male gamete dispersal in the highly philopatric bat species Thyroptera tricolor
(2013-11)
For species characterized by philopatry of both sexes, mate selection represents an important behaviour for inbreeding avoidance, yet the implications for gene flow are rarely quantified. Here, we present evidence of male ...
Análisis de la progenie de individuos productores y no productores de gametos masculinos no reducidos de turnera sidoides (passifloraceae)
(Sociedad Argentina de Botánica, 2015)
La unión de gametos 2n ha tenido un importante papel en el origen de los poliploides de
Turnera sidoides. Sin embargo, como en este complejo la tasa de formación de neopoliploides es baja,
el establecimiento de los mismos ...
Assessment of gametes in tilapia Oreochromis niloticus: effects of body weight in a new lineage
(Insight Medical Publishing, 2018)
Epithelial and neural cadherin expression in the mammalain reproductive tract and gametes and their participation in fertilization-related events
(Academic Press Inc Elsevier Science, 2015-05)
Mammalian fertilization involves a series of well-orchestrated cell-cell interaction steps between gametes, as well as among spermatozoa and somatic cells of both the male and female reproductive tracts. Cadherins are ...