Question

If a nucleus of a frog egg is destroyed and replaced with the nucleus of an intestinal cell from a tadpole, the egg can develop into a normal tadpole. This demonstrates that:
A. Intestinal cells are fully differentiated.
B. There is little functional difference between an egg cell and an intestinal cell.
C. An intestinal cell possesses a full set of genes.
D. Interstitial cells are not differentiated.

Answer 1

Hint: In oogamous organisms, the egg cell, or ovum, is the female reproductive cell (gamete). The egg cell is much larger (easily visible) than motile sperm cells and it isn't capable of active movement. Intestinal cells are a type of epithelium cell that is relatively simple, in which epithelium cells are one of the 4 basic tissues of the human body. They increase the surface area of the small intestine, which quickens the absorption of nutrients.
Complete step by step solution:
In this case, a frog egg nucleus is annihilated and substituted by a nucleus from the cell belonging to the same species which has already differentiated into an intestinal cell. The DNA carries the instructions for developing each biological structure, but which structure is actually produced is indeed a subject of cell differentiation and shaping. In biology, this means that, while every cell does have the details to potentially construct whatever structure (or differentiate into any cell type), environmental conditions determine which route of differentiation is used.

Thus, when an intestinal cell nucleus is placed in the setting (environment) of an egg, the egg might very well produce factors that "turn on" genes and programs inside of DNA from the nucleus which are related to egg development rather than intestinal cell functions. As an outcome, the nucleus is influenced to behave like an egg cell nucleus. Thus, an egg can develop into a normal tadpole if a nucleus of a frog egg is annihilated and substituted with the nucleus of an intestinal cell from a tadpole.

The correct option is C


Note:
This demonstrates that an intestinal cell retains each and every genetic information required by the various types of tissues that comprise a frog.