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.
Analysis of chromosome structural aberrations was limited to the 11 autosomal macrochromosomes and the Z chromosome in Giemsa-stained metaphase cells (Sonoda et al.
We analyzed 11 autosomal macrochromosomes and the Z chromosome from 50 mitotic cells per culture and recorded the frequency of SCEs.
Consequently, in general, current cytogenetic studies of avian chromosomes focus on specific macrochromosomes
, which are highly conserved (Stock & Mengden 1975, Derjusheva et al.
Chromosome morphology of SBF59 line : The number of chromosomes in the Silkie Bantam was 2n = 78, consisting of 10 pairs of macrochromosomes and 28 pairs of microchromosomes, whilst the sex chromosome type was ZZ ([male])/ZW ([female]).
The chromosomes of poultry have been defined as possessing 8 pairs of macrochromosomes and 30 pairs of microchromosomes with the sex chromosomes Z and W.
Note that rearrangements of macrochromosomes
1, 2, and 6 can be unambiguously identified and in this study were treated as alternative alleles segregating at unlinked Mendelian loci.
All species examined share the first three macrochromosomes.
The eight largest pairs of macrochromosomes (including the sex chromosomes) are distinguishable by size from the remaining 29 pairs of smaller microchromosomes.
Abbreviations are as follows: number of heterozygous macrochromosomes (Het); total number of nuclei scored (N), number and percent abnormal nuclei, and number and percent aneuploid nuclei.
In six individuals, the occurrence of the Y chromosome with the metacentric element of the heterozygous macrochromosome and the two X chromosomes with the two acrocentric elements was greater than the reciprocal combinations (table 4A-C).
1] or recombinant phenotypes of chromosome 2 were also heterozygous for one to four of the five remaining macrochromosomes