Barbara McClintock's Scientific Contributions

Barbara McClintock, a pioneering geneticist, made significant contributions to cytogenetics by proving genes are located on chromosomes and discovering transposable elements, or jumping genes. Despite facing ridicule and lack of recognition in her time, her work was eventually acknowledged with a Nobel Prize in 1983. This video highlights her groundbreaking research and the challenges she faced as a female scientist.

Who was the scientist that made significant contributions to cytogenetics before Watson and Crick's discovery of DNA structure?

• Rosalind Franklin

• Lise Meitner

• Barbara McClintock

• Marie Curie

What did Barbara McClintock prove about genes in 1931?

• They are located in the mitochondria

• They are located in the cytoplasm

• They are located on chromosomes

• They are located in the cell membrane

What phenomenon did McClintock discover while studying Indian corn?

• Gene silencing

• Gene duplication

• Gene splicing

• Transposable elements

What are transposable elements also known as?

• Fixed genes

• Silent genes

• Static genes

• Jumping genes

What was a major challenge McClintock faced as a female scientist in the 1940s?

• No access to laboratories

• Inability to publish research

• Lack of funding

• Ridicule and lack of recognition

What did McClintock discover about gene silencing in 1951?

• Genes are silenced by enzymes

• Genes are silenced by proteins

• Genes are silenced by RNA

• Genes are silenced by lipids

Why did McClintock stop publishing her research?

• She changed her research focus

• She ran out of funding

• She retired

• She faced ridicule and lack of acceptance

When did scientists begin to recognize the validity of McClintock's work?

• 1970s

• 1960s

• 1950s

• 1980s

In what year did Barbara McClintock receive the Nobel Prize for her discovery?

• 1993

• 1983

• 2003

• 1973

What is unique about McClintock's Nobel Prize in Physiology or Medicine?

• It was shared with another scientist

• It was awarded posthumously

• It was the first unshared Nobel Prize in that category awarded to a woman

• It was awarded for a discovery in physics