Podcast
Questions and Answers
What critical breakthrough did Nettie Stevens identify in her research?
What critical breakthrough did Nettie Stevens identify in her research?
- How environmental factors affect chromosome behavior
- The role of sex chromosomes in determining sex (correct)
- The relationship between nutrition and genetic expression
- The influence of temperature on sex determination
In what year did Nettie Stevens earn her PhD?
In what year did Nettie Stevens earn her PhD?
- 1896
- 1903 (correct)
- 1912
- 1900
What methodology did Nettie Stevens use to study sex determination?
What methodology did Nettie Stevens use to study sex determination?
- Field studies on reproductive behavior
- Microscopic studies of reproductive cells (correct)
- Quantitative assays of nutrient absorption
- Genetic sequencing of DNA
Who was Nettie Stevens's mentor during her PhD studies?
Who was Nettie Stevens's mentor during her PhD studies?
What was the predominant belief about sex determination prior to Stevens's research?
What was the predominant belief about sex determination prior to Stevens's research?
How did Nettie Stevens contribute to the theory of chromosomal inheritance?
How did Nettie Stevens contribute to the theory of chromosomal inheritance?
Which of the following findings is credited to Nettie Stevens?
Which of the following findings is credited to Nettie Stevens?
What was Thomas Hunt Morgan's perspective on Nettie Stevens's contributions?
What was Thomas Hunt Morgan's perspective on Nettie Stevens's contributions?
Flashcards
Nettie Stevens's field of study
Nettie Stevens's field of study
Nettie Stevens was a biologist who focused on sex determination and chromosomes.
Sex determination in early 20th century
Sex determination in early 20th century
Scientists debated whether external factors or chromosomes determined sex.
Stevens's mealworm research
Stevens's mealworm research
Her research studied the behavior of chromosomes in mealworms, leading to a groundbreaking discovery.
X and Y chromosomes role
X and Y chromosomes role
Signup and view all the flashcards
Thomas Hunt Morgan's statement
Thomas Hunt Morgan's statement
Signup and view all the flashcards
Stevens's PhD institution
Stevens's PhD institution
Signup and view all the flashcards
Stevens's initial career
Stevens's initial career
Signup and view all the flashcards
Stevens's University enrollment
Stevens's University enrollment
Signup and view all the flashcards
Study Notes
Nettie Stevens: Early Geneticist
- Nettie Stevens (US biologist) pioneered research on sex determination
- Found that animal sex is determined by particular chromosomes
- One of the first female geneticists, but her work was often overlooked
- Graduated from Stanford University with a masters in biology in 1900
- Earned a PhD from Bryn Mawr in 1903 under Thomas Hunt Morgan
- Studied chromosomal behavior in mealworms, funded by Carnegie Institute (1904)
- Published her sex determination findings in 1905
- Her work connected a physical characteristic (sex) to a chromosome
- Discovered that females produce only X chromosomes and males produce X and Y chromosomes.
- Her detailed microscopic studies of reproductive cells supported the theory of chromosomal inheritance.
Sex Determination Research
- Early 20th-century scientists debated how sex was determined.
- Some believed factors like temperature or nutrition were involved
- Stevens's mealworm research disproved this idea
Recognition and Legacy
- Stevens's discovery of the link between chromosomes and sex wasn't widely accepted until after her death.
- Thomas Hunt Morgan (geneticist) acknowledged her work in 1912
- Her pioneering work is now recognized as vital research on the topic of chromosomal inheritance.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the groundbreaking work of Nettie Stevens, a trailblazer in the field of genetics and one of the first female geneticists. This quiz covers her pioneering research on sex determination through chromosomes and her significant contributions to understanding chromosomal inheritance during the early 20th century.
