Triangle of U

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/triangle-of-u

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the discoverer?Woo Jang-choon (U Nagaharu), published in 1935
2. What is the key mechanism?Interspecific hybridization followed by genome duplication (allopolyploidization)
3. How did broccoli, cabbage, and cauliflower become related?They all come from the same family of plants called Brassica. The Triangle of U shows that they share parts of their DNA because they were made by combining the DNA of three original plants.
4. Who discovered the Triangle of U?A scientist named Woo Jang-choon, who also used the name U Nagaharu, studied plant chromosomes in the 1930s and created the Triangle of U.

Allotetraploid: A polyploid organism containing two or more sets of chromosomes, originating from different species.
Cytogenetics: A branch of biology that links cytology (the study of cells) with genetics (the study of heredity).
Polyploidization: The process by which an organism acquires one or more additional sets of chromosomes, leading to polyploidy.