Dual-Sex Butterfly and the Risks of ... Oxygen

TL;DR

A volunteer at a museum discovered a butterfly with both male and female characteristics, caused by a chromosomal error, while a study suggests that breathing in more oxygen at lower elevations may increase the risk of lung cancer.

Transcript

last week we told you about how monarch butterflies are disappearing because of industrialized agriculture and massive use of herbicides making their habitat less exist II but this week another butterfly is making headlines for a very different reason a volunteer with the Natural History Museum at Britain's Drexel University was working in a live b... Read More

Key Insights

• 🕵️‍♀️ Bilateral gynandromorphism is a condition in which an animal exhibits both male and female characteristics due to a chromosomal error during embryonic development.
• 😘 Breathing in more oxygen at lower elevations may increase the risk of lung cancer, as the reactive oxygen species produced during metabolism can damage cells and DNA.
• ☠️ The study found a correlation between elevation and lung cancer rates, with rates decreasing as elevation increased.
• ♋ Other cancer rates, like breast and colon cancer, were not affected by changes in altitude.
• ♋ This study does not suggest that breathing at sea level causes cancer, but it highlights the association between elevation and lung cancer rates.
• 🛀 Previous studies have shown that reducing ambient oxygen levels can shrink tumors in mice, indicating the potential role of oxygen in cancer development.
• 🤕 The study adjusted for various risk factors, such as age, ethnicity, and smoking, to isolate the influence of elevation on lung cancer rates.

Questions & Answers

Q: What did the volunteer at the Natural History Museum discover?

The volunteer discovered a butterfly with features of both male and female, which is a rare condition known as bilateral gynandromorphism.

Q: How does bilateral gynandromorphism occur?

It occurs due to an error in the division of sex chromosomes during the early stages of embryonic development. This results in an animal with male characteristics on one side and female characteristics on the other.

Q: Is bilateral gynandromorphism possible in humans?

No, bilateral gynandromorphism can only occur in insects and animals. The human biology is different, and such chromosomal errors do not happen.

Q: What does the study suggest about oxygen and cancer rates?

The study suggests that breathing in more oxygen at lower elevations might increase the risk of lung cancer, as reactive oxygen species produced during metabolism can damage cells and DNA.

Summary & Key Takeaways

• A volunteer at the Natural History Museum discovered a unique butterfly with traits of both male and female, known as bilateral gynandromorphism.

• Breathing in more oxygen at lower elevations may increase the risk of lung cancer, according to a study examining cancer rates at high elevations.