| unequal crossing over and heterochromatin exchange in the x-y bivalents of the deer mouse, peromyscus beatae. | differences in length of the heterochromatic short arms of the x and y chromosomes in individuals of peromyscus beatae are hypothesized to result from unequal crossing over. to test this hypothesis, we examined patterns of synapsis, chiasma formation, and segregation for male p. beatae which were either heterozygous or homozygous for the amount of short-arm sex heterochromatin. synaptonemal complex analysis demonstrated that mitotic differences in heterochromatic short-arm lengths between the x ... | 1990 | 2397657 |
| genetic diversity of hantaviruses in mexico: identification of three novel hantaviruses from neotominae rodents. | a variety of hantaviruses are harbored by rodents in north and south america, some of which can cause hantavirus pulmonary syndrome. to obtain greater evolutionary insight into hantaviruses in the americas, a total of 211 rodents were captured in the mexican states of guerrero and morelos in 2006. anti-hantavirus antibodies were detected in 27 of 211 serum samples (12.8%) by elisa. the distribution of seropositive rodents was: 17 peromyscus beatae, 1 megadontomys thomasi, 1 neotoma picta, 6 reit ... | 2011 | 22138671 |
| ecology of hantaviruses in mexico: genetic identification of rodent host species and spillover infection. | in our recent epidemiological survey conducted in mexico for hantavirus infection, we identified three distinct viruses circulating in mexican wild rodents, namely montano virus (mtnv), huitzilac virus (huiv), and carrizal virus (carv). to gain a detailed understanding of hantavirus epidemiology and its associated hosts, 410 rodents were captured at eight collecting points in morelos and guerrero, mexico, and examined for hantavirus seroprevalence, the presence of viral rna, and rodent host spec ... | 2012 | 22750131 |
| synaptic adjustment in peromyscus beatae (rodentia: cricetidae) heterozygous for interstitial heterochromatin. | chromosomal pairing and chiasma formation were studied two individuals of peromyscus beatae heterozygous for the presence of a large block of interstitial heterochromatin. although the modified chromosome was of medium size, analysis of c-banded diakinetic configurations revealed that it was the homolog of one of the smallest autosomes. analysis of silver stained synaptonemal complexes indicated that synapsis was either unidirectional from initiation at one set of telomeres or was bidirectional ... | 1989 | 2743813 |