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Genetics Society of America's Genetics journal highlights for December 2012
Date:12/4/2012

ic basis of a violation of Dollo's law: Re-evolution of rotating sex combs in Drosophila bipectinata, pp. 1465-1475
Thaddeus Seher, Chen Siang Ng, Sarah Signor, Ondrej Podlaha, Olga Barmina, and Artyom Kopp
"Dollo's law" posits that complex traits, once lost during evolution, cannot be regained. However, phylogenetic analyses reveal occasional violations of this law. This article describes the genetic basis of one such reversal. Rotated sex combs were lost and subsequently regained in the ananassae species subgroup of Drosophila. This reversal is largely associated with one chromosomal inversion that covers 5% of the genome, suggesting that rotating sex combs may have re-evolved though changes in relatively few genes.

A comprehensive genetic approach for improving prediction of skin cancer risk in humans, pp. 1493-1502
Ana I. Vazquez, Gustavo de los Campos, Yann C. Klimentidis, Guilherme J. M. Rosa, Daniel Gianola, Nengjun Yi, and David B. Allison
Predicting complex traits in humans is difficult because most of the genetic variance remains unaccounted for and many small-effect genes are usually involved. These investigators developed several models for predicting skin cancer risk. Prediction improved significantly when genetic parameters such as family history and geographical ancestry were included, especially when thousands of markers across the genome were considered. These methods could be extended to prediction of other diseases.

This Month's Perspectives

Mammalian developmental genetics in the twentieth century, pp. 1151-1163
Karen Artzt
This Perspectives reviews the breathtaking history of mammalian genetics in the past century from a mouse developmental geneticist's point of view. The dizzying speed of progress is illustrated with selected examples of genetic enigmas now solved and includes a retrospective discussion of the T/t complex. It is a story of how hypothesis-d
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Contact: Phyllis Edelman
pedelman@genetics-gsa.org
301-634-7302
Genetics Society of America
Source:Eurekalert

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