Unlike other forms of gene regulation (those involving transcription factors, for example), epigenetic changes are passed on during cell division to daughter and granddaughter cells until they are actively erased.
Remarkably, of the four "granddaughter" cells derived from a single cell, only one cell switches in nearly 90% of pedigrees.
A flight attendant addresses me as "Mr. Sedaris," and I feel sorry that she's forced to memorize my name rather than, say, her granddaughter's cell-phone number.
In wild-type L3 stage animals, three VU cells divide to produce 12 granddaughters, six of which are induced by the AC to adopt π fates (located in two different focal planes, three on each side).
To confirm these results, we ablated all the granddaughters of the Z cells except Z1.ap and Z4.pa (Fig. 1H) or except Z1.ap alone (Fig. 1I).
However, granddaughters of old mother cells are apparently able to clear the damage (McMurray & Gottschling, 2004; Kaeberlein, 2010).
For example, although daughters of very old mother cells have a shorter lifespan, the granddaughters restored lifespan to that observed in the daughters of young mothers (Kennedy et al., 1994).
versatilis strain Sj4 cells by quantifying zygote formation among four granddaughter progeny of a single cell.
This observation of producing a single zygote indicates that only one among four granddaughter progeny of a single cell ever switches (Miyata and Miyata 1981; Egel and Eie 1987; Klar 1990).
Chances are good that your granddaughter can figure your whole cell phone out in minutes, with hers being much more complicated than yours.
Uploaded and turned into a PDF file, the note becomes an e-mail that her granddaughter gets on her computer or cell phone.
