Word: dna
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Dates: during 1990-1999
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...studies showed that identical twins were more likely to have the same sexual orientation than other pairs of siblings. That same year, a California scientist reported slight brain differences between gay and straight men, although the conclusion is disputed. And in 1993, an NIH researcher found a stretch of DNA on the X chromosome that seemed to harbor one or more genes affecting sexual orientation. But no one has proved that a particular gene promotes gayness or has offered any convincing theory of how genes could influence a person's choice of sleeping partners...
...gene works is intriguing, and may offer some clues to the biochemical roots of gayness. Surprisingly, the swatch of DNA in question was discovered long ago, and is one of the most thoroughly studied of all fruit-fly genes. It is called the "white" gene because, among many effects, it influences eye color, and a particular mutation in the gene causes a fly's normally red eyes to be white. The gene's specific job is to produce a protein that enables cells to utilize an essential amino acid called tryptophan. If fruit flies are unable to process tryptophan properly...
...book, be forewarned, is not a layman's treatise on the mechanisms of natural selection. Dennett plunges right into the philosophical implications of evolution without giving a thorough explanation of Mendelian genetics or the process of DNA replication, so that the biology novice will no doubt feel a bit swamped from the beginning. Unfortunately, the situation does not improve as Dennett rockets through literally dozens of debates and subtopics within Darwinism. The sheer breadth of the book makes it better suited for someone already acquainted with the state of current evolutionary biology...
...Simpson jury heard testimony about yet another set of DNA tests implicating the football hero in the murders. But testimony was overshadowed by other issues: first, a noisy dispute between the prosecution and defense over whether Simpson's lawyers could introduce an alibi statement Simpson gave to police (Judge Ito ruled they could not); and second, the dismissal of another juror, the eighth one (leaving only four alternates...
...horror" and unfairly inflame jurors. Prosecutors had long contended that the photos, which graphically illustrate how the victims were killed, were essential to their case. It is not yet known when the prosecution will present the pictures to the jury, which slogged through yet another day of often tedious DNA testimony from criminalist Collin Yamauchi...