microchromosomes

microchromosomes

very small chromosomes found only in avian karyotypes.
References in periodicals archive ?
The presence of 0-2 microchromosomes Bs was also observed, which varied in number not only between but also in the same karyotypic snap.
Unlike mammals, birds (along with reptiles, fish, and amphibians) have a large number of tiny microchromosomes.
labrosus from the Tibagi River, which showed a diploid number of 2n = 56 chromosomes with karyotype formula of 32 m + 8 sm + 6st + 10a, and also described the presence of 0-3 supernumerary microchromosomes in this population.
The paired microchromosomes, idiochromosomes and heterotropic chromosomes in Hemiptera.
Comparison of linkage disequilibrium and haplotype diversity on macro- and microchromosomes in chicken.
Both lizards show the same chromosomal morphology, which consists of six pairs of metacentric (M) and submetacentric (SM) macrochromosomes, microchromosome number (#) 7 with acrocentric-telocentric morphology (A-T) and microchromosomes #8 and 9 with M-SM morphology, the rest of microchromosomes are punctiforms.
Microchromosomes are difficult to accurately count because of small size and morphological uniformity.
Thirty of the chromosomes are called microchromosomes, being less than one-tenth the size of the chicken's largest chromosome.
Formation of de novo centromeres and construction of first-generation human artificial microchromosomes.
Genetic material from the sperm is generally not incorporated into the progeny's genome (Kallman 1962), although microchromosomes from the males can be incorporated into the gynogen's genome (Schartl et al.
In all, there are 52 chromosomes, many of them very small, much like reptilian microchromosomes.