In many reptiles, sex determination is dependent not on sex…
In many reptiles, sex determination is dependent not on sex chromosomes but rather environmental conditions such as temperature. Species that use temperature are said to have temperature-dependent sex determination (TSD). One known mechanism for TSD in some species is the temperature-dependent activity of an enzyme, aromatase, that acts to convert androgens (hormones that promote male development) to estrogens (hormones that promote female development). You have begun to study two species of lizards that seem to use TSD. You collect eggs from both species and rear them at various temperatures with and without applied fadrozole, a chemical that specifically inhibits the activity of aromatase. Your results are as follows. Based on these results, what can you conclude about sex determination in species A and species B?
Read DetailsA 51-year-old female comes to the primary care clinic with r…
A 51-year-old female comes to the primary care clinic with reports of severe hot flashes. She states that her last menstrual period was approximately 14 months prior to her appt. She also has experienced painful sexual intercourse with signficant vaginal dryness. The provider considers whether or not to begin hormone therapy. Which factors would be considered critical to determination of the appropriateness of hormone therapy? Select all that apply.
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