Get this from a library embryology and embryonic fission in the genus crisia alice robertson. Full text of university of california publications see other formats . Full text of university of california publications in zoology see other formats . Abstract animal polyembryony appears to be paradoxical because it clones an unproven genotype at the expense of genetic diversity in a clutch however it is employed by at least 18 taxa in six phyla excluding instances of occasional twinning
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