21. Evolutionary dynamics of segmental duplications from human Y-chromosomal euchromatin / heterochromatin transition regions. 22. When genes are placed near a region of constitutive heterochromatin , their transcription is usually silenced. 23. The quantity and distribution of heterochromatin among both X chromosomes and autosomes is different as well. 24. It is a megastructure containing several siRNA which use the RNAi pathway to regulate heterochromatin formation. 25. The mechanism by which the RITS complex induces heterochromatin formation and organization is not well understood. 26. The heterochromatin can spread stochastically and switch off the color gene resulting in the white eye sectors. 27. It specifically stains constitutive heterochromatin , which are regions of the chromosome at or near the centromere. 28. Overall, it plays a vital role in heterochromatin organization, chromosome segregation, and mitotic progression. 29. This suggests that facultative heterochromatin interacts with the polycomb repression complex in order to limit lytic reactivation. 30. Heterochromatin protein 1 ( HP1 ) binds both chromatin and the LBR . ONM, outer nuclear membrane.
