It is possible that a mild rejection occurred in Japanese quail chimeras that had a female karyotype in the forebrain and male karyotype in the rest of their body. This article has been cited by other articles in PMC. Sex differences in subregions of the medial nucleus of the amygdala and the bed nucleus of the stria terminalis of the rat.
Since the adult chimeras showed low plasma level of testosterone which is required for male-type copulatory behavior, their impaired reproductive behaviors were attributable to their lower testosterone level.
By applying a similar method, the male female brain could be replaced by the female male brain of conspecies in Galliformes.
Chicken chimeras that have a male karyotype in the brain and female karyotype in their gonads have an irregular ovulatory cycle Maekawa et al. Evidence for a morphological sex difference within the medial preoptic area of the rat brain. Infertility in male aquatic invertebrates: a review.
Understanding the epigenetic process that underlies the mechanism of parental bias would open up a new avenue of research on sex chromosomal effects in the brain. Control of reproductive behavior by sex steroids in male quail.
This suggests that gonadal steroids may determine brain function related to overall sexual dimorphic behavior. The molecular mechanism of gonadal development in mammals and birds has been studied extensively.
Because the two species are closely related and share a high genetic identity it is conceivable that amhy could exist in O. Evolution — Google Scholar. The autosomal amh homolog of O. Chromosoma — PubMed Google Scholar. Buy options. Advertisement Hide.
Only two studies of brain chimeras, one in Japanese quail and another in chicken, have ever been conducted. Gonadal hormone-independent sexual differentiation of the avian brain It has been suspected that genes located on the sex chromosome act in a cell-autonomous manner in brain cells to differentiate song-related circuits.
Skip to main content Skip to table of contents. We speculated the following three possible explanations for these discrepancies of pathology, resulting from transplantation:. Possible similarities of sex differences in brain, physiology and behavior in mammals and birds.
Hormone-induced sexual differentiation of brain and behavior in zebra finches.