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TCI DEPUTY PREMIER TO ATTEND STATE RECOGNISED FUNERAL OF MYLES RUTHANN MUNROE

first_imgFacebook Twitter Google+LinkedInPinterestWhatsAppProvidenciales, 03 Dec 2014 –At 10am a short ceremony will be held for the late Dr. Myles Munroe and his wife at Bahamas Faith Ministries International in Nassau; minutes after the public will be able to sign the book of condolences in lieu of viewing the bodies of the pair who died on Sunday November 9th when their plane exploded in mid-air after colliding with a crane at the Grand Bahama Shipyard; the Munroes and seven others were trying to land in bad weather that day; trying to make it into Freeport for a Global Leadership Summit which Dr. Myles had organized as a way to boost tourism to the island which has suffered a severe economic depression since 2004’s Hurricanes Frances and Jeanne. The State Recognized funeral, where Grammy Award winning Gospel Artist Cece Winans is confirmed to sing, is tomorrow; Deputy Premier of the Turks and Caicos Islands, Hon. Akierra Missick will attend. At 6pm today, the National Memorial Service is planned for the Thomas A Robinson Stadium which seats 15,000. Facebook Twitter Google+LinkedInPinterestWhatsApp Education Minister touts new ICT platform for Public Schools Bahamas gives State funeral to noted choir director Related Items:akierra missick, bahamas faith ministries, cece winans, Dr. Myles Munroe, funeral, grand bahama shiyard Ministry of Education introduces pilot program Recommended for youlast_img read more

Sex chromosome evolution tracked in fruit fly

first_img Explore further More information: Sex-Specific Adaptation Drives Early Sex Chromosome Evolution in Drosophila, Science 20 July 2012: Vol. 337 no. 6092 pp. 341-345. DOI: 10.1126/science.1225385ABSTRACTMost species’ sex chromosomes are derived from ancient autosomes and show few signatures of their origins. We studied the sex chromosomes of Drosophila miranda, where a neo-Y chromosome originated only approximately 1 million years ago. Whole-genome and transcriptome analysis reveals massive degeneration of the neo-Y, that male-beneficial genes on the neo-Y are more likely to undergo accelerated protein evolution, and that neo-Y genes evolve biased expression toward male-specific tissues—the shrinking gene content of the neo-Y becomes masculinized. In contrast, although older X chromosomes show a paucity of genes expressed in male tissues, neo-X genes highly expressed in male-specific tissues undergo increased rates of protein evolution if haploid in males. Thus, the response to sex-specific selection can shift at different stages of X differentiation, resulting in masculinization or demasculinization of the X-chromosomal gene content. Journal information: Science This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. The X and Y chromosomes in the fruit fly are, like the human X and Y chromosomes, vastly different in size and base sequence. In humans the chromosome pair is thought to have begun to evolve about 200 million years ago from an original closely matched pair of autosomal (non-sex) chromosomes. At present the Y chromosome contains only around 50 genes, while the much larger X chromosome contains about 1,000. In most species the evolution from autosome to sex chromosome occurred so long ago their evolution is difficult to track because there are few remnants of their origins.The research team, Assistant Professor Doris Bachtrog and Dr. Qi Zhou of the Department of Integrative Biology at the University of California, Berkeley, decided to try to shed some light on sex chromosome evolution by studying the genome of Drosophila miranda flies, in which “neo-X” and “neo-Y” chromosomes first appeared when the Y chromosome fused with an autosome only about one million years ago. In a related species, Drosophila pseudoobscura, no fusion occurred, and so by comparing the genomes of the two species, the researchers were able to demonstrate how the X and Y chromosomes have evolved in D. miranda.According to Bachtrog, when the neo-X and neo-Y chromosomes formed, about 3,000 genes were sex-linked, with female flies having two copies of neo-X and male flies having one copy each of neo-Y and neo-X. In the million years since the fusion, the Y chromosome shows massive degeneration, with over a third of the neo-Y genes having lost their function. The degeneration was already known to occur, but Prof. Bachtrog said the speed at which it had occurred was surprising.Along with genes that have lost their function, other genes on the Y chromosome have evolved to be beneficial to males and expressed in specifically male tissues such as the prostate gland and testes. A similar evolution is also occurring on the X chromosome, on which genes expressed in female tissues are becoming more dominant. The process of the genes becoming more beneficial to females is thought to take longer on the X chromosome because males also contain a copy of the X, leading to a slower distribution of these genes than in the Y, which is only found in males. The evolution of the X chromosome is not only slower, but includes larger events, such as incorporation of genes from other chromosomes into the X.Bachtrog pointed out that in fruit flies some sex chromosomes have reverted to autosomes, and it is also possible that in Drosophila species the Y chromosome could eventually disappear altogether, and another mechanism for determining sex could then evolve. (Phys.org) — Fruit flies are commonly used in genetics research because their lifespan is short, they are easy to breed in the laboratory, and mutants are widely available. There are about 1,500 known species. Now a new study of one of these species of fruit fly has tracked the evolution of a pair of sex chromosomes that appeared only around a million years ago.center_img Scheme of a Chromosome. (1) Chromatid. One of the two identical parts of the chromosome after S phase. (2) Centromere. The point where the two chromatids touch, and where the microtubules attach. (3) Short arm (4) Long arm. In accordance with the display rules in Cytogenetics, the short arm is on top. Image: Wikipedia. © 2012 Phys.org Citation: Sex chromosome evolution tracked in fruit fly (2012, July 20) retrieved 18 August 2019 from https://phys.org/news/2012-07-sex-chromosome-evolution-tracked-fruit.html The story of X — evolution of a sex chromosomelast_img read more