Role of recombination and faithfulness to partner in sex chromosome degeneration. Preliminary phylogenetic analyses utilizing available sequences of D. The turning off recombination appeared in 24, MCs for the first simulation type and in 22, MCs for the second type Fig.
Discussion Factors and mechanisms of the stopping recombination between X and Y chromosomes are still controversial Polytene chromosomes also reveal an independently derived pericentric inversion in Muller's element C of D. This evolutionary strategy purifies the X chromosome from defective alleles and leads to the larger number of females than males in the population.
Therefore, we ran two additional types of simulations. The male-specific region of the human Y chromosome is a mosaic of discrete sequence classes.
Eur Phys J B 65— Cervino, A. Strickberger M: Experiments in Genetics with Drosophila. Graves, J. Genet Res 49—
Thus, it can be conclude that the recombination between X chromosomes in females protects them from degradation Nature , 82—86 Garncarz, D. Electronic supplementary material. Bachtrog D: Expression profile of a degenerating neo-Y chromosome in Drosophila.