STEPHEN PALMER
Bastia Hill
Gay in DNA
I must assume that John Haakma (letter, June 21) was responding to my letter on "gay parenting" of May 29 and not to my response to Rod Anderson's letter of June 8 in which I cited Mukherjee's The Gene (etc) as the source for my comment on "gayness" being genetically driven.
If indeed Haakma had read my second letter, his "disingenuousness" is in question, not mine, the word being defined as "dishonest, having secret motives, insincere".
Mukherjee cites J. Michael Bailey, a professor of psychology, as having demonstrated the concordance of "gayness" among identical twins at 52 per cent for both twins among 56 pairs. Of 54 pairs of non-identical twins, 22 per cent were both gay — still much higher than the 10 per cent estimated in the total population. In this 1980s research, Mukherjee wrote that Bailey had "profoundly changed the conversation around sexual identity from the 1960s rhetoric of 'choice' and 'personal preference' towards biology, genetics and inheritance."
Then, in 1991, Dean Hamer set about trying to locate the gene that should be identifiable for such results. By summer of 1992 he'd built family trees for nearly 1000 members of 114 gay men, producing a sibling concordance rate of 20 per cent — nearly twice the population rate.
Deeper analysis of the family trees demonstrated the genetic inheritance "sidestepping through generations — forwards and across like a knight's move in chess". "Hamer had suddenly moved from a phenotype (sexual preference) to a potential location on a chromosome — a genotype. He had not identified the "gay gene", but he had PROVED that a piece of DNA associated with sexual orientation could be physically mapped to the human genome." These extracts described by Mukherjee trace several years of research by Hamer.
This kind of material is what Mr Haakma's bundled commentary, unsourced, does not provide, and sounds to me dated and picked over to mesh with biblical absolutism. But the rock bottom of this whole discussion is that the horses have already bolted.
Government after government in modern nations and states have accepted the reality of gay people of both sexes in their democracies, often giving them the right to marry and parent children.
This has sometimes been accomplished by general referendum, as in recent cases in Australia and Ireland, and gives the lie to those who persist in claiming to represent "the majority".
RUSS HAY
Whanganui