Posted in Uncategorized on December 4, 2007 | Leave a Comment »
Polyploid Classification:
Autopolyploids: result from an increase in ploidy level within a species (AAAA)
Allopolyploids: Result from hybridization between species
Genomic allopolyploids: carry entire chromosome sets from 2 or more species. Chromosomes from different species do not pair during meiosis. (AABB)
Segmental allopolyploids: some chromosomes do not pair, others do. Often unstable [...]
Posted in Uncategorized on December 3, 2007 | Leave a Comment »
Haldane’s rule, paraphrased: The heterogametic sex is more likely to be absent, rare, or sterile in the offspring of two species; the homogametic is less likely to be affected by these things. This rule holds in most animals possessing sex chromosomes. Obviously this wouldn’t hold true for sex determined by temperature during [...]
