Two Researchers Experimentally Formed Tetraploid Frogs by Fertilizing Diploid Eggs

question 2

Multiple Choice

Two researchers experimentally formed tetraploid frogs by fertilizing diploid eggs from Rana porosa brevipoda with diploid sperm from Rana nigromaculata. When they mated these tetraploid frogs with each other, most of the offspring that survived to maturity were tetraploid, with chromosome sets of both diploid parent species. Based on these results, if this type of tetraploid formed in the wild, what would be the result?

• A) The two parent species would interbreed and fuse into one species.
• B) The two parent species would recognize each other as mates.
• C) The tetraploids would be reproductively isolated from both parent species.
• D) The tetraploids would be selected against.

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Definitions:

Grey Matter

A major component of the central nervous system, consisting mostly of neuronal cell bodies, dendrites, and unmyelinated axons, associated with processing and cognition.

White Matter

The part of the brain and spinal cord composed of myelinated nerve fibers that is responsible for transmitting information between brain regions and between the brain and the spinal cord.

Cognitive Development

The process by which individuals acquire and evolve their thinking abilities, including perceiving, remembering, understanding, and reasoning.

Jean Piaget

A Swiss psychologist known for his pioneering work in child development, particularly his theory of cognitive development that describes how children construct a mental model of the world.