Monodelphis domestica
نویسندگان
چکیده
منابع مشابه
Heterochrony in somitogenesis rate in a model marsupial, Monodelphis domestica.
Marsupial newborns are highly altricial and also show a wide array of shifts in the rate or timing of developmental events so that certain neonatal structures are quite mature. One particularly notable feature is the steep gradient in development along the anterior-posterior axis such that anterior structures are generally well developed relative to posterior ones. Here, we study somitogenesis ...
متن کاملGonadal sex differentiation in the neonatal marsupial, Monodelphis domestica.
A quantitative and histological study of the gonads of newborn grey short-tailed opossums, Monodelphis domestica, is described. The pups were karyotyped, and comparisons were made within litters segregating for XX and XY sex chromosomes. A total of four litters including 25 pups were available. On the day of birth, developing testes were significantly larger than the ovaries of litter mates, an...
متن کاملAmelotin Gene Structure and Expression during Enamel Formation in the Opossum Monodelphis domestica
Amelotin (AMTN) is an ameloblast-secreted protein that belongs to the secretory calcium-binding phosphoprotein family, which also includes the enamel matrix proteins amelogenin, ameloblastin and enamelin. Although AMTN is supposed to play an important role in enamel formation, data were long limited to the rodents, in which it is expressed during the maturation stage. Recent comparative studies...
متن کاملBehavioural observations of singly-housed grey short-tailed opossums (Monodelphis domestica) in standard and enriched environments.
The grey short-tailed opossum (Monodelphis domestica) has been used in biomedical research for over three decades. It is normally housed in standard rat cages and appears to have adapted well to captivity. Owing to their aggressive behaviour towards each other, adult males are normally housed singly and may spend considerable periods of time in social isolation. We wanted to carry out a prelimi...
متن کاملMale pheromone stimulates ovarian follicular development and body growth in juvenile female opossums (Monodelphis domestica)
Female opossums are induced into estrus by direct exposure to a non-volatile pheromone in male scentmarks. Juvenile females develop this responsiveness by 150 days of age (days), and earlier (130 days) if exposed to male pheromone beginning at 90 days. The goal of this study was to examine the effect of male pheromone on body growth and ovarian follicular development in young opossums. Females ...
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ژورنال
عنوان ژورنال: Mammalian Species
سال: 2004
ISSN: 0076-3519,1545-1410
DOI: 10.1644/760