Abstract：
:A female frog heterozygous at two unlinked loci, specifying electrophoretic forms of mannosephosphate isomerase (MPI) and malate dehydrogenase (MDH) was crossed to male frogs homozygous for different alleles at each locus. In the offspring approximately ten percent proved to be triploid according to nucleolar and chromosome counts of tail tip cells. Most of these triploids had both maternal alleles at the MDH and MPI loci suggesting that the first meiotic division was repressed. Others seemed to represent a repressed second meiotic division and one animal, a pentaploid, could only have resulted from inhibition of both meiotic divisions of the egg. Densitometer tracings of starch gels stained for 6 phosphogluconate and isocitrate dehydrogenases, expected to be heterozygous in a particular cross, demonstrated that the triploids had twice as much maternal as paternal gene product for each locus, similar to patterns found in triploids produced by nuclear transplantation.
journal_name
Geneticsjournal_title
Geneticsauthors
Wright DA,Huang CP,Chuoke BDkeywords:
subject
Has Abstractpub_date
1976-10-01 00:00:00pages
319-32issue
2eissn
0016-6731issn
1943-2631journal_volume
84pub_type
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