It is helpful to copy the text from the image if you can and post it on the blockchain. Like this:

What is Chimerism?
Chimerism in humans can occur when a mom is
pregnant with twins. If one embryo dies, the
other one could possibly absorb its deceased
twin's cells. Normally, in humans, you have cells
with only your DNA, which is a basic
understanding of genetics. The body has
numerous types of cells, but all the cells contain
your exact type of DNA. But with a chimera, this
basic understanding is obsolete. A chimera will
have two sets of cells with two distinct types of
DNA.