Blaschko's lines

High school (ages 12+)
Human Body

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/blaschko-s-lines

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 developmental origin?Reflects the migration pathways of embryonic ectodermal cells
2. What is the genetic basis?Primarily visible in individuals with genetic mosaicism or chimerism
3. Why do some people have spots or colors that follow these lines?Because some of their skin cells have different genes, so the spots or colors line up with the paths the cells took while growing.
4. Can Blaschko's lines help doctors?Yes, doctors use them to spot certain skin disorders, like incontinentia pigmenti or CHILD syndrome, because the problems often follow the lines.

Genetic mosaicism: The presence of two or more genetically distinct cell populations within a single organism.
Ectodermal cells: Cells originating from the ectoderm, the outermost germ layer of an embryo, which form skin and nervous tissue.
Somatic mutation: A genetic alteration that occurs after fertilization in a non-reproductive cell.