Meiosis in Male Chorthippus
In the species of the genus Chorthippus, as in a majority of the genera in the sub-family Truxalinae, the mitotic chromosome complement of the male includes seventeen members. Sixteen of these are autosomes and can be matched into eight homologous pairs; the seventeenth chromosome is unpaired and represents a sex or X-chromosome. All these elements are individually distinguishable (Fig. 1). Six of the autosomes are metacentric and these are the longest chromosomes in the complement (pairs L1–L3); the remainder are acrocentric and include one pair of small chromosomes (S 8) and a range of medium pairs (M4–M7). The unpaired X-chromosome is the longest of the acrocentrics.
KeywordsSpindle Pole Spindle System Chiasma Formation Longe Chromosome Diplotene Stage
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