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POPSHomosexual behavior due to genetics and environmental factors “Overall, genetics accounted for around 35 per cent of the differences between men in homosexual behavior and other individual-specific environmental factors (that is, not societal attitudes, family or parenting which are shared by twins) accounted for around 64 per cent. In other words, men become gay or straight because of different developmental pathways, not just one pathway.” For women, genetics explained roughly 18 per cent of the variation in same-sex behavior, non-shared environment roughly 64 per cent and shared factors, or the family environment, explained 16 per cent. The study shows that genetic influences are important but modest, and that non-shared environmental factors, which may include factors operating during fetal development, dominate.
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POPSCrossed (evolutionary) signals? Animals depend on tyrosine phosphorylation to conduct a number of important communications between their cells, including immune system responses, hormone system stimulation and other crucial functions. These phospho-tyrosine signaling pathways utilize a three-part system of molecular components to make these communications possible.
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POPSBaby to be born free of breast cancer after embryo screening This case of genetic intervention for the elimination of genetic diseases, is a ground breaking first that may change our world and our ethical outlook. Many more will follow. I was quite surprised to read the following: "Some critics say it is wrong to destroy embryos because there is only a chance women with the gene may develop breast cancer in adulthood. They argue that, increasingly, breast cancer can also be successfully treated. " The said "embryos" are 3 days old lumps of undifferentiated cells.
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