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Genetics and the Battle of the Sexes

At evolgen, a blogger sums up recent research on sexually antagonistic genes. Several papers look across species, from human, mouse, and fruit fly, at the effect of X-linked copies of genes -- genes from the X-chromosome that are duplicated and appear on autosomes and are expressed in a biased fashion in male- and female-specific tissues. In one paper, Brian Oliver of the NIH looked across different Drosophila species to conclude that natural selection drives male-biased genes off the X chromosome independently of the effects of X inactivation during spermatogenesis.

The Scan

Pig Organ Transplants Considered

The Wall Street Journal reports that the US Food and Drug Administration may soon allow clinical trials that involve transplanting pig organs into humans.

'Poo-Bank' Proposal

Harvard Medical School researchers suggest people should bank stool samples when they are young to transplant when they later develop age-related diseases.

Spurred to Develop Again

New Scientist reports that researchers may have uncovered why about 60 percent of in vitro fertilization embryos stop developing.

Science Papers Examine Breast Milk Cell Populations, Cerebral Cortex Cellular Diversity, Micronesia Population History

In Science this week: unique cell populations found within breast milk, 100 transcriptionally distinct cell populations uncovered in the cerebral cortex, and more.