Nettie Stevens and Sex Determination

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Questions and Answers

What specific discovery did Nettie Stevens make regarding sex determination?

Males have two Y chromosomes while females have one X and one Y.
Chromosomes have no impact on an organism's physical traits.
An animal's sex is determined by specific chromosomes. (correct)
Sex is determined by environmental factors during embryonic development.

During which period did Nettie Stevens conduct her research on mealworms?

1900 to 1910
1905 to 1912
1896 to 1900
1904 to 1905 (correct)

What was a major consequence of Stevens' findings on sex determination?

They confirmed that sex is entirely determined by environment.
They suggested that sex determination is random and not chromosomal.
They changed the understanding of gender roles in society.
They established a connection between chromosomes and physical traits. (correct)

What academic achievement did Nettie Stevens accomplish in 1903?

She earned her PhD. (D) Signup and view all the answers

What did Thomas Hunt Morgan state regarding Nettie Stevens' work?

Her work will be remembered. (A) Signup and view all the answers

Which aspect of Nettie Stevens' research was often overlooked during her lifetime?

Her role as a female scientist. (B) Signup and view all the answers

What offered life-changing opportunities to Nettie Stevens that she had to decline?

A research professor role at Bryn Mawr. (C) Signup and view all the answers

Which of the following summarizes the significance of Stevens' findings?

They established a clear link between chromosomes and biological sex. (C) Signup and view all the answers

Flashcards

Environmental Sex Determination

The idea that a person's sex is determined by external factors during embryonic development.

Chromosomal Sex Determination

A process where sex is determined by specific chromosomes, typically X and Y, inherited from parents. This is the primary mechanism in most mammals, including humans.

Pioneering Scientist

A scientist who challenges established ideas and makes groundbreaking discoveries, often facing initial resistance.

Chromosome

A microscopic structure in cells that carries genetic information. This information determines inherited traits.