Medline Google Scholar. A pronounced evolutionary shift of the pseudoautosomal region boundary in house mice. A rapid rate of sex-chromosome turnover and non-random transitions in true frogs. When a new sex-determining gene arises on the previously existing sex-determining chromosome it is called homologous turnover.
Genomes 4 : 25 —
Multiple SSR were used to map scaffolds to linkage groups in cases where multiple priming sites were present on alternate scaffolds. Sam files were coordinate sorted using SAMtools v1. We then used k -mer analysis to identify ancestral Y sequence SI Appendix.
Caused by an extra chromosome 21 in each cell.
Karyotyping also may be done to find out whether chromosomal problems may have caused a fetus to be stillborn. The use of techniques providing chromosomal architecture e. Fisher, R. Gigascience 118 Chromosoma 71 1 : 65 —
Mutat Res. For example, a p53 knockout mouse lacks the gene encoding for the p53 protein. Independent stratum formation on the avian sex chromosomes reveals inter-chromosomal gene conversion and predominance of purifying selection on the W chromosome. Sex chromosome theory also implies a linear process, starting from sex chromosome origin and progressing to heteromorphism.
This map achieved inclusive coverage of the entire Mb Populus genome with linkage groups corresponding to the 19 haploid chromosomes.