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Records 1 to 12 of 12
Am I a Girl, or a Boy?
A baby is born with ambiguous genitalia to parents from the Dominican Republic and is determined to be a female based on general appearance.  At the child's 12-year-old checkup, the parents and the child are distraught as they report to the pediat...

Anencephaly in Yakima
This case study explores the recent (2010 - 2016) outbreak of neural tube defects, specifically anencephaly, in a rural three-county region of Washington state, particularly Yakima, WA. The case study focuses on the biological aspects of teratogens tha...

Born for Recovery: The Effects of Maternal Methadone Use on Neonates
This interrupted case study presents the story of "Jane Paul," a 27-year-old pregnant woman excited by the prospect of bringing a new life into the world. Jane had been using heroin for the past seven years, but when she learns she is pregnant, she goe...

Bringing Home More than a Medal
This case study was inspired by the Zika virus outbreak that occurred around the time of the 2016 Olympic Games. Many athletes were fearful of attending because of the link between Zika virus infection and microcephaly in infants. This concern, however...

Do You See What Eye See?
A common misconception is that Darwin suggested that something as complex as the eye could not have evolved through natural selection. While the misunderstanding often comes from an incomplete reading of his argument, we have long known that intermedia...

Don’t Lose Your Head!
This whimsical case introduces students to the topic of dorsal/ventral (DV) axis formation in amphibians. After the recent birth of a good-sized clutch of eggs, Heather Pipiens is pleased to see that most of her little larvae are doing fine, but alarme...

Gender: In the Genes or in the Jeans?
How are males and females different? Most people have a sex that is consistent on all levels: genetic, gonadal, internal genitals, external genitals. But sometimes there are discrepancies. This case explores the biology of human sexual differentiation ...

Hyper-IgM Syndrome
Hyper-IgM syndrome is an X-linked genetic disorder more commonly affecting males than females. It is caused by the lack of heavy chain class-switching from IgM to other isotypes. Patients with hyper-IgM syndrome are susceptible to a variety of infectio...

Nature or Nurture
This case explores the question of whether gender identity is determined strictly by genetics (nature) or social variables (nurture).  It is based on a true story about a man who was raised as a girl and later rejected the female gender identity.&...

Sonic Hedgehog
In this case study about a baby born with the genetic condition holoprosencephaly, students explore the “Sonic hedgehog” gene, signal transduction, and the ethics of body and tissue donation. The assignment involves students writing an info...

The Dangers of Deicing
Loss of species richness is often due to anthropogenic activity. The global decline of amphibians is one such example. This case study examines the impact of road deicing agents on amphibians living near bridges and roads treated heavily with salt duri...

The Lady of Charleston?
This case uses the real story of Dawn Langley Simmons, who may have been misidentified as male at birth, to illustrate the developmental basis of human sexual dimorphism and how gender misidentification may occur. Students also consider the emotional, ...