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New study shows ‘genetic underpinnings’ of bisexuality

University of Michigan findings show link to risk-taking

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A new study conducted by University of Michigan researchers and published Jan. 3 in the journal Science Advances identifies genetic variations linked to human bisexual behavior and found that genetic characteristics associated with bisexuality are also linked to risk-taking behavior in males.

A statement released by the University of Michigan announcing the study says its findings may answer at least in part the longstanding question by evolutionary biologists of how the genes associated with same-sex behavior have persisted in humans because “same-sex sexual behavior does not result in offspring.”  

The study was conducted by University of Michigan Professor and evolutionary biologist Jianzhi Zhang and co-author and U.M. graduate student Siliang Song.

“The U.M. researchers analyzed data from more than 450,000 participants of European ancestry in the United Kingdom’s Biobank database of genetic and health information,” the university’s statement says. “Participants responded to a questionnaire that included the question, ‘Would you describe yourself as someone who takes risks?’”

According to the university statement, “The U.M. analysis revealed that male heterosexuals who carry the genetic variants associated with bisexual behavior, which are known as BSB-associated alleles, father more children than average. Furthermore, men who describe themselves as risk-takers tend to have more children and are more likely to carry BSB-associated alleles.”

Alleles are said to be matching genes, one from a person’s biological mother and the other from the biological father.

The statement says the two researchers also analyzed and compared the genetic makeup of both bisexual behavior and exclusive same-sex behavior, which they list as eSSB.

“When they compared the genetic basis of bisexual behavior to the genetic basis of eSSB, they found them to be significantly different,” the statement continues. “They found that eSSB-associated genetic variants are correlated with fewer children, which is expected to lead to a gradual decline in their frequency over time,” it says.

“However, the authors stress that their study looks at the genetic underpinnings of same-sex sexual behavior and not the behaviors themselves, which are affected by both genetic and environmental factors,” says the statement. It says the authors point out that the proportion of UK Biobank study participants reporting same-sex sexual behavior has risen in recent decades, mostly likely due to societal acceptance toward same-sex behavior.

In their study, the authors estimate a person’s bisexual behavior is influenced by genetics at about 40 percent and by environmental factors by about 60 percent.

“In addition, the authors say their new results ‘predominantly contribute to the diversity, richness, and better understanding of human sexuality. They are not in any way intended to suggest or endorse discrimination on the basis of sexual behavior,’ they wrote,” the University of Michigan statement says.

But an article about the study in Science Magazine says scientists and experts in the field of genetics have had mixed reactions to the study, with some questioning its reliance on the data from the UK Biobank surveys and others expressing concern that its claim that bisexuality is linked to risk-taking could perpetuate longstanding bias against bisexuals and gay men. 

The Science Magazine article reports that psychologist Michael Bailey of Northwestern University, who has studied factors that influence sexual orientation, believes the study is “based only on self-reported past sexual behavior of the UK Biobank participants, and not on other aspects of sexuality, such as sexual orientation or feelings.”

Other experts in the field of genetics and human behavior, however, believe the study sheds valuable light on the issue of bisexual and exclusive same-sex behavior.

The full study can be accessed at science.org.

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National

Supreme Court deals blow to trans student privacy protections

Under this ruling, parents are entitled to be informed about their children’s gender identity at school, regardless of state protections for student privacy.

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Transgender rights activists protest outside the Supreme Court in early 2026. (Washington Blade Photo by Michael Key)

The Supreme Court on Monday blocked a California policy that allowed teachers to withhold information about a student’s gender identity from their parents.

The policy had permitted California students to explore their gender identity at school without that information automatically being disclosed to their parents. Now, educators in the state will be required to inform parents about developments related to a student’s gender identity, depending on how the case proceeds in lower courts.

The case involves two sets of parents — identified in court filings as John and Jane Poe and John and Jane Doe — both of which say their daughters began identifying as boys at school without their knowledge, citing religious objections to gender transitioning.

The Poes say they only learned about their daughter’s gender dysphoria after she attempted suicide in eighth grade and was hospitalized. After treatment for the attempt and after being returned to school the following year, teachers continued using a male name and pronouns despite the parents’ objections, citing California law. The Poes have since placed their daughter in therapy and psychiatric care.

Similarly, the Does say their daughter has intermittently identified as a boy since fifth grade, but while their daughter was in seventh grade, they confronted school administrators over concerns that staff were using a male name and pronouns without informing them. The principal told them state law barred disclosure without the child’s consent.

Both sets of parents filed lawsuits in the U.S. District Court for the Southern District of California challenging the state policy that protects students’ gender identity and limits when schools can disclose that information to parents.

The justices voted along ideological lines, with the court’s six conservative members in the majority and the three liberal justices dissenting.

“We conclude that the parents who seek religious exemptions are likely to succeed on the merits of their Free Exercise Clause claim,” the court said in an unsigned order. “The parents who assert a free exercise claim have sincere religious beliefs about sex and gender, and they feel a religious obligation to raise their children in accordance with those beliefs. California’s policies violate those beliefs.”

In dissent, the three liberal justices argued that the case is still working its way through the lower courts and that there was no need for the high court to intervene at this stage. Justice Elena Kagan wrote, “If nothing else, this Court owes it to a sovereign State to avoid throwing over its policies in a slapdash way, if the Court can provide normal procedures. And throwing over a State’s policy is what the Court does today.”

Conservative Justices Samuel Alito and Clarence Thomas indicated they would have gone further and granted broader relief to the parents and teachers challenging the policy.

The emergency appeal from a group of teachers and parents in California followed a decision from the United States Court of Appeals for the Ninth Circuit that allowed the state’s policy to remain in effect. The appeals court had paused an order from U.S. District Judge Roger Benitez — who was nominated by George W. Bush — that sided with the parents and teachers and put the policy on hold.

The legal challenge was backed by the Thomas More Society, which relied heavily on a decision last year in which the court’s conservative majority sided with a group of religious parents seeking to opt their elementary school children out of engaging with LGBTQ-themed books in the classroom.

California Attorney General Rob Bonta expressed disappointment with the ruling. “We remain committed to ensuring a safe, welcoming school environment for all students while respecting the crucial role parents play in students’ lives,” his office said in a statement.

The decision comes as the Trump administration has taken a hardline approach to transgender rights. During his State of the Union address last week, President Donald Trump referenced Sage Blair, who previously identified as transgender and later detransitioned, describing Blair’s experience transitioning in a public school. According to the president, school employees supported Blair’s chosen gender identity and did not initially inform Blair’s parents.

President Donald Trump acknowledges Sage Blair, pictured second from left, during his speech at the State of the Union on Feb. 24. (Washington Blade photo by Michael Key)

Last year, the court upheld Tennessee’s ban on gender-affirming medical care for transgender minors and has allowed enforcement of a policy barring transgender people from serving in the military to continue during Trump’s second term.

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Comings & Goings

Gil Pontes III named to Financial Advisory Board in Wilton Manors

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Gil Pontes III

The Comings & Goings column is about sharing the professional successes of our community. We want to recognize those landing new jobs, new clients for their business, joining boards of organizations and other achievements. Please share your successes with us at [email protected]

Congratulations to Gil Pontes III on his recent appointment to the Financial Advisory Board for the City of Wilton Manors, Fla. Upon being appointed he said, “I’m honored to join the Financial Advisory Board for the City of Wilton Manors at such an important moment for our community. In my role as Executive Director of the NextGen Chamber of Commerce, I spend much of my time focused on economic growth, fiscal sustainability, and the long-term competitiveness of emerging business leaders. I look forward to bringing that perspective to Wilton Manors — helping ensure responsible stewardship of public resources while supporting a vibrant, inclusive local economy.”

Pontes is a nonprofit executive with years of development, operations, budget, management, and strategic planning experience in 501(c)(3), 501(c)(4), and political organizations. Pontes is currently executive director of NextGen, Chamber of Commerce. NextGen Chamber’s mission is to “empower emerging business leaders by generating insights, encouraging engagement, and nurturing leadership development to shape the future economy.” Prior to that he served as managing director of The Nora Project, and director of development also at The Nora Project. He has held a number of other positions including Major Gifts Officer, Thundermist Health Center, and has worked in both real estate and banking including as Business Solutions Adviser, Ironwood Financial. For three years he was a Selectman, Town of Berkley, Mass. In that role, he managed HR and general governance for town government. There were 200+ staff and 6,500 constituents. He balanced a $20,000,000 budget annually, established an Economic Development Committee, and hired the first town administrator.

Pontes earned his bachelor’s degree in political science from the University of Massachusetts, Dartmouth.

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Kansas

ACLU sues Kansas over law invalidating trans residents’ IDs

A new Kansas bill requires transgender residents to have their driver’s licenses reflect their sex assigned at birth, invalidating current licenses.

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Kenda Kirby, transgender, Supreme Court, gay news, Washington Blade
A transgender flag flies in front of the Supreme Court. (Washington Blade file photo by Michael Key)

Transgender people across Kansas received letters in the mail on Wednesday demanding the immediate surrender of their driver’s licenses following passage of one of the harshest transgender bathroom bans in the nation. Now the American Civil Liberties Union is filing a lawsuit to block the ban and protect transgender residents from what advocates describe as “sweeping” and “punitive” consequences.

Independent journalist Erin Reed broke the story Wednesday after lawmakers approved House Substitute for Senate Bill 244. In her reporting, Reed included a photo of the letter sent to transgender Kansans, requiring them to obtain a driver’s license that reflects their sex assigned at birth rather than the gender with which they identify.

According to the reporting, transgender Kansans must surrender their driver’s licenses and that their current credentials — regardless of expiration date — will be considered invalid upon the law’s publication. The move effectively nullifies previously issued identification documents, creating immediate uncertainty for those impacted.

House Substitute for Senate Bill 244 also stipulates that any transgender person caught driving without a valid license could face a class B misdemeanor, punishable by up to six months in jail and a $1,000 fine. That potential penalty adds a criminal dimension to what began as an administrative action. It also compounds the legal risks for transgender Kansans, as the state already requires county jails to house inmates according to sex assigned at birth — a policy that advocates say can place transgender detainees at heightened risk.

Beyond identification issues, SB 244 not only bans transgender people from using restrooms that match their gender identity in government buildings — including libraries, courthouses, state parks, hospitals, and interstate rest stops — with the possibility for criminal penalties, but also allows for what critics have described as a “bathroom bounty hunter” provision. The measure permits anyone who encounters a transgender person in a restroom — including potentially in private businesses — to sue them for large sums of money, dramatically expanding the scope of enforcement beyond government authorities.

The lawsuit challenging SB 244 was filed today in the District Court of Douglas County on behalf of anonymous plaintiffs Daniel Doe and Matthew Moe by the American Civil Liberties Union, the ACLU of Kansas, and Ballard Spahr LLP. The complaint argues that SB 244 violates the Kansas Constitution’s protections for personal autonomy, privacy, equality under the law, due process, and freedom of speech.

Additionally, the American Civil Liberties Union filed a temporary restraining order on behalf of the anonymous plaintiffs, arguing that the order — followed by a temporary injunction — is necessary to prevent the “irreparable harm” that would result from SB 244.

State Rep. Abi Boatman, a Wichita Democrat and the only transgender member of the Kansas Legislature, told the Kansas City Star on Wednesday that “persecution is the point.”

“This legislation is a direct attack on the dignity and humanity of transgender Kansans,” said Monica Bennett, legal director of the ACLU of Kansas. “It undermines our state’s strong constitutional protections against government overreach and persecution.”

“SB 244 is a cruel and craven threat to public safety all in the name of fostering fear, division, and paranoia,” said Harper Seldin, senior staff attorney for the ACLU’s LGBTQ & HIV Rights Project. “The invalidation of state-issued IDs threatens to out transgender people against their will every time they apply for a job, rent an apartment, or interact with police. Taken as a whole, SB 244 is a transparent attempt to deny transgender people autonomy over their own identities and push them out of public life altogether.”

“SB 244 presents a state-sanctioned attack on transgender people aimed at silencing, dehumanizing, and alienating Kansans whose gender identity does not conform to the state legislature’s preferences,” said Heather St. Clair, a Ballard Spahr litigator working on the case. “Ballard Spahr is committed to standing with the ACLU and the plaintiffs in fighting on behalf of transgender Kansans for a remedy against the injustices presented by SB 244, and is dedicated to protecting the constitutional rights jeopardized by this new law.”

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