Does Homosexuality Have A Biological Basis?

A pattern emerges where the scholarly literature exploring this topic is largely focused on males. Reason being is that it appears that males are the sex who are predominantly homosexual in their orientation (LeVay & Baldwin, 2012). However, the sensitivity within the discourse of sexual orientation arises when it is debated upon whether one 's sexual preference is innate at birth, hence a force of nature or biology, or if it is a result of culture, nurture or environmental factors (Emmanuele et al., 2010). Furthermore, an experimental design will be proposed to further examine this topic. Comparing the three chosen studies, it is evident that a biological and endocrinological perspective does account for sexual orientation (Kraemer et al., 2006; Manning et al., 2007; Miller et al., 2008). Of the studies that currently exist on this topic, data shows that prenatal testosterone levels are indicative of sexual orientation (Kraemer et al., 2006; Manning et al., 2007; Miller et al., 2008). This paper addresses a topic that is relevant in today 's society; a topic that has, for the most part, been written off as having any scientific roots (Emmanuele et al., 2010). This paper counters that belief and in reading this essay, it will be evident that biology and endocrinology have a much stronger influence on sexual orientation than previously thought.

A highly debated issue concerning homosexuality is whether sexual-orientation is biologically determined or if it is a socially learned behavior. One case study done about this topic gathered that “the homosexual desire seems in most cases to be implanted in those who develop an unusually strong attachment for one parent” (Cory 1951:67). This seems to suggest that homosexuality can be influenced by family structure or other sociological elements. On the other side of this argument, there is the belief that people are born either gay or straight. Even though there is no scientific or genetic evidence to prove this, there have been many studies done and most homosexuals interviewed take this view-point. McIntosh states, “[homosexuality] is still commonly seen as a condition characterizing certain persons in the way that birthplace or deformity might characterize them” (1968:182). To support their cause and to fight for acceptance in society, it would be beneficial to convince people that sexual orientation is biologically determined. “Research indicates that people who believe that homosexuality is a choice are more likely to condemn it than are those who believe gays and lesbians are born that way”

Another research suggests that sexual orientation is impacted by a gene or genes found on the X chromosome. Though genetic tendencies for homosexuality may be passed from mothers to their children (Rahman & Wilson, 2003). During human evolution, homosexuality was developed to minimize competition between males for a limited number of potential female mates (Schulling, 2004).

He contradicted the argument that homosexual behaviour is related to genetic, hormonal or biological disorder. To abolish these views, the author mentions that ‘no school of medicine, medical journal or professional organization has ever recognized such claims (p. 2) - at least at the time he wrote the article in 1994.

It is a fair assumption to say that America is approaching a new age in understanding and accepting the many variations of human sexual orientation. More same-sex couples have fostered children than ever before in our nation 's history. Institutions such as military and professional sports have (slowly but surely) began to accept openly gay members. Most importantly, a recent amendment to the Marriage Act of 1961 now defines marriage as a union of two people; an amendment which removed the prohibition of same-sex marriages. These landmarks in the progression of social awareness surrounding sexual orientation are derivative of scientific findings disputing the "choice" theory. As outlined in Simon LeVay 's book, Gay, Straight, and the Reason Why, the result of someone 's sexual orientation "emerges from the prenatal sexual differentiation of the brain" (LeVay 2011: 271) What LeVay means in this context is, "whether a person ends up gay or straight depends in large part on how this process of biological differentiation goes forward, with the lead actors being genes, sex hormones, and the brain systems" (LeVay 2011: 271). Much research, proven and theoretical, has been done on the concept of what makes people gay. Many factors surrounding socialization in regards to sexual orientation have undergone extensive scientific scrutiny (LeVay 2011: 77). Although there is evidence that suggests social and environmental elements play a role in sexual orientation, it is

If sexuality is developed at an early stage in a person’s life, then how does homosexuality occur? Homosexuality in Darwin’s selection theory doesn’t even exist. (Roughgarden, 2009, 127) Some say that it’s based on the person’s surrounding environment and influences while others say that it’s purely genetic. There has been substantial evidence that points to both genetic and environmental factors in developing homosexuality, but no one factor that clearly pushes over the top to define the origins of homosexuality. Statistically if a male is straight then there is a 4% percent chance that his brother might be gay, but if the male himself is gay, then the percentage jumps to 22%. (Roughgarden 2009: 247) These statistics simply show that gay males tend to group in families, it doesn’t necessarily point out anything specific about the environment’s effects or the male’s genetic makeup. (Roughgarden, 2009, 247)

In one article by Marcia Malory, “Homosexuality & Choice: Are Gay People ‘Born This Way’”, she goes into multiple studies on the genetics of a gay child's parents. A study conducted in 1993 the “gay gene” matter arose when it was looked into the homosexual children's parents having a different X chromosome marker. Nonetheless genes do not control our behavior completely as does environment. The brain may also play a role in sexual preference, like the study in 1991 showing the difference in neurons and pituitary glands. Later in the 2000s more studies showed that gay men have more symmetrical hemisphere and amygdala resembles that of women's. The brain develops in the womb and continues through late adulthood. When did a fetus choose its

There are multiple theories people hold on how they believe homosexuality started or is generally caused. However, after multiple studies and ongoing research the likelihood that it is nature, rather than nurture, based is going strong. Although, as of now, there has been no exact consensus among researchers, after examining possible genetic, hormonal, developmental, social, and/or cultural influences, to prove that homosexuality is completely one or the other, but it is usually found that people cannot choose their sexual orientation, but rather only

When a man and a woman engage in unprotected sexual intercourse, the end result tends to be life, as a child is born nine months later. Only once a man’s sperm reaches the eggs of a woman is this possible. Clearly, life and the existence of the human species as a whole is the product of sex between a man and a woman. The norm of reproduction then, is the aforementioned union between man and woman in heterosexual intercourse. Heterosexuality is viewed as the norm of most societies. This norm creates controversy regarding homosexuality, as it [homosexualism] is considered deviant and against societal norms. The topic of homosexuality is important and worth further investigation because it is surrounded by controversial issues

The nature and nature of homosexuality is heavily debated. Some people believe that homosexuality is biologically determined and others believe it’s base on ones environment. This topic can be argue to be base on both nature and nurture. Studies conducted in the past decades support both the biological and environmental aspect of homosexuality.

The world has come very far with all the dramatic changes we have faced over the years. Wouldn’t you agree? As much change as the world has been through there are still numerous social problems that still exist in society today. Amongst those numerous social problems, sexual orientation and inequality stand out to me. Research from biology, psychology, and sociology is where our understanding of sexual orientation comes from. There are two hypothetical theories researchers have discovered examining the biological basis toward sexual orientation. One concept is the neurohormonal theory, biologist contend that homosexuality is caused by abnormal sex hormone levels in utero. The alternative theory is based on behavioral genetics, determining the source and magnitude of genetic impact on sexual orientation. This theory suggested the concept that gay men were genetically female. Later this theory was proven to be false. Homosexuality was considered as a pathology or mental illness. Not every psychologists agreed with that perspective. A researcher by the name of Havelock Ellis stated that homosexuality was congenital and for that reason it could not be considered as a disease. Sigmund Freud another theorist had the concept that everyone is born bisexual and that either homosexuality or heterosexuality is developed through social and personal experience. Ellis and Freud both concurred that homosexuality was not a mental illness. Despite these researchers’ opinions in 1973,

Science is uncovered origins a lot of things over the centuries and the human created much great inventions and even explored the surface of the moon; however, one question still on everyone’s mind and science may have solved one of greatest mysteries yet which is: how did homosexuality and heterosexuality evolve? Many psychologist, biologist and scientist may agree with sexual orientation is output from a combination of biological, hormonal, environmental and emotional factors and those many factors that influence to a development of human sexual orientation. However, being homosexual or bisexual is not mentally ill or abnormal in certain ways, although sexual minority is part of social problems that makes output from misinformation or prejudicial attitude. Diversity in sexual orientation has been a subject that has been seen in different perspectives by the different people (LeVay, 2010). Today there are the homosexuals, heterosexuals and bisexuals orientated people are forming a part of our society. This paper conduct an overall study of important and strong factors and provides accurate information and explanation for those who want to better understand development of sexual orientation.

Many people now believe the reporting of many popular newspapers and magazines report of the "discovery" of a link between a certain gene and homosexuality, but hasn't it been considered a choice for such a long time? Is homosexuality a choice rather than genetic? To answer this question we'll start off by revealing some myths of homosexuality. The next part will explain the difference between a behavioral trait and a genetic trait. Finally I'll end be unveiling the truth behind the "homosexual gene."

It has long been debated where our sexual orientation comes from, particularly whether its biological or social forces driving these behaviors. In regards to homosexuality and bisexuals, some have argued that it may be a choice that these individuals are making.(Levay 2012: 41)Some have even said it is a mental disorder that one can recover from, but there is plenty of data that says otherwise.(Levay 2012: 41)(Levay 2012: 65) I believe diverse sexual orientations develop in humans due to sex hormones during fetal life, gene influences, and other effects such as birth order influences. I’ve come to this conclusion based on the narrative provided via Dr. Simon LeVay’s book Gay Straight, and the Reason Why, and the research that has been compiled showing strong influences from a multitude or reasons. I will also be looking at a research paper by Francesca Iemmola and Andrea Camperio Ciani, who looked into genetic factors influencing sexual orientation in men. It is clear there are gender differences between men and women, and this is probably one of the strongest indicators that hormones can affect the outcome of variations in gender traits.

This question has been asked for many years: is being homosexual a decision, or are people born that way? During the1990’s people thought it was an illness or a disgrace to the family, but now homosexuals are perceived differently due to studies. Neuroscientists of the Christianity Today Newspaper, argue that homosexuality can be a natural response of the hypothalamus itself based on the size of hypothalamus the child is born with. Neuroscientists have questioned “does its size determine homosexuality, or does homosexuality determine its size?” (Dallas). Yet, no one can be sure since the test was done on two deceased men. This being said, people can believe homosexuality is a gene that they are born with. This situation has aroused through this century as research rises concerning behaviors from the structures of the brain. In order to continue to convince the reader that people can be born homosexual and it is not a choice that they make as they grow. The article “Born Gay?” written by