A veterinarian amputated a swollen testicle from a zebra at a zoo and discovered that the testicle
contained a molar tooth, complete with long roots. What is the most likely explanation?
A.The genes that govern the growth of teeth moved from the zebra\'s mouth down to his testicle.
B.The genes that govern the growth of teeth were duplicated too many times during cell division.
C.The genes that govern the growth of teeth were accidentally turned on in the cells of the
testicle.
D.A gene that normally governs the production of sperm mutated into a gene coding for teeth.
E.Another zebra had bitten the testicle, and the tooth got embedded in the flesh.
Solution
Answer is C. In multicellular organisms, all cells comprises same genetic composition but the
expressed portions are different in different types of cells. This is called cell or tissue specific
expression. Some times due to some mutations, the genes which acctually not expressed in that
cells are also expressed. This is thecalled reason for abovedifferences condition.
A veterinarian amputated a swollen testicle from a zebra at a zoo an.pdf
1. A veterinarian amputated a swollen testicle from a zebra at a zoo and discovered that the testicle
contained a molar tooth, complete with long roots. What is the most likely explanation?
A.The genes that govern the growth of teeth moved from the zebra's mouth down to his testicle.
B.The genes that govern the growth of teeth were duplicated too many times during cell division.
C.The genes that govern the growth of teeth were accidentally turned on in the cells of the
testicle.
D.A gene that normally governs the production of sperm mutated into a gene coding for teeth.
E.Another zebra had bitten the testicle, and the tooth got embedded in the flesh.
Solution
Answer is C. In multicellular organisms, all cells comprises same genetic composition but the
expressed portions are different in different types of cells. This is called cell or tissue specific
expression. Some times due to some mutations, the genes which acctually not expressed in that
cells are also expressed. This is thecalled reason for abovedifferences condition
