08-07-2006, 12:03 AM
A small deletion has removed the LCR (locus control region) from a chromosomal domain containing three genes encoding proteins that are expressed at different times (embryonic, fetal, or adult, respectively) during development. The remainder of the domain is intact. How would this mutation most likely affect the expression of the genes in the domain?
All three genes would be expressed during the embryonic phase of development.
All three genes would be expressed during the fetal period of development.
All three genes would be expressed in the adult.
One gene would be expressed during the fetal period and the others would be active in the adult.
All three genes would be silenced throughout life of the individual
All three genes would be expressed during the embryonic phase of development.
All three genes would be expressed during the fetal period of development.
All three genes would be expressed in the adult.
One gene would be expressed during the fetal period and the others would be active in the adult.
All three genes would be silenced throughout life of the individual