Which embryonic stem cell characteristic is referred to as totipotent?
a. Ability to differentiate into any type of somatic cell.
b. Ability to repair its own damaged DNA.
c. Ability to determine which parental chro-mosome copy it will imprint.
d. Ability to minimize the impact of poor in utero nutrition.
ANS: A
Each of the cells in the very early embryo has the potential to give rise to a somatic cell of any type. These embryonic stem cells are therefore said to be totipotent ("possessing all powers"). The term totipotent does not infer the ability to repair damaged DNA, select specific chromosome copies, or adjust for poor in utero nutrition.
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