Arnold AP Sexual differentiation of the zebra finch song system: positive evidence, negative evidence, null hypotheses, and a paradigm shift. Mapping of Drosophila mutations using site-specific male recombination. Meiotic pairing and imprinted X chromatin assembly in Caenorhabditis elegans.
Stanbury, J. Thus, deletion of one Asm-1 allele had rendered the second allele susceptible to silencing. The genotypes are shown in Figure Shortly after birth, prospermatogonia in the male gonad resume mitosis and initiate spermatogenesis Russell et al.
Bakker, E. All measurements were made in gonadectomized adults treated with equal levels of testosterone, or in gonadally intact newborn mice However, other experimental findings question the primacy of gonadal hormones and suggest a role for other factors. Close mobile search navigation Article Navigation.
Sundequist, V. A During normal male meiosis, the X and Y chromosomes synapse and crossover within the distal pseudoautosomal region; this crossover is essential in ensuring normal homologous segregation during the first meiotic division MI.
Unfortunately, sometimes it is the variant cell that has the selective advantage.
Genome Biol 6 : R Furthermore, most studies on X-gene expression have focused on protein-coding genes. For most X-linked deleterious variants, the manifestations are less severe in females than males. However, we postpone a full discussion of this topic until Chapter