When the Sheep Dolly Was Successfully Cloned,it Was Produced by Growing

question 34

Multiple Choice

When the sheep Dolly was successfully cloned,it was produced by growing an in vitro fertilized egg where the normal egg nucleus had been removed and replaced by a nucleus from an adult.Since this nucleus is from an old mature animal,we would expect it to ______.Interestingly,tests show that this did not happen,a fact that currently puzzles researchers.

• A)have additional Barr bodies
• B)be mutated
• C)have shorter telomeres
• D)have longer telomeres
• E)express transcription and translation more rapidly

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Definitions:

Molecular Phylogenetic Studies

Research that uses the molecular sequences of DNA, RNA, or proteins to infer the evolutionary relationships between different species or organisms.

Lobe-Finned Fish

A group of fish characterized by fleshy, lobed, paired fins, which are precursors of the limbs of land-living vertebrates.

Tetrapods

Land vertebrates with four limbs or leg-like appendages, including mammals, amphibians, reptiles, and birds.

Phylogenetic Patterns

The arrangement and relationships among organisms or groups of organisms that reflect their evolutionary history and descent.