The Effects of Changes in Chromosome Number on Amphibian Development

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Abstract
Methods for obtaining triploid, tetraploid, pentaploid, and haploid individuals in amphibia are outlined, as are methods for their recognition in living specimens. The primary effects of haploidy and polyploidy are that the cells and their nuclei are in approx. proportion to the chromosome number. Secondary effects are observed in body size, rate of development, viability and other physiol. changes. The effects on sex determination are outlined and discussed. The suggestion is made that chromosome number should accompany the description of every species.