Karyological studies on the Indian spiders VII. Mitosis and meiosis in two species belonging to the family gnaphosidae |
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Authors: | Om Parkash Mittal |
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Affiliation: | (1) Department of Zoology, Panjab University, Chandigarh-14, India |
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Abstract: | Gnaphosa kailana Tikader andScotophaeus blackwallii (Thorell) are characterized by twenty-two (20+X1X2) and twenty-four (22+X1X2) acrocentric chromosomes in their diploid set respectively. In case ofG. kailana the sex-chromosomes are slightly unequal while inS. blackwallii the size difference is well marked between the two. The sex-chromosomes in both species form an accessory plate at the equator of the spindle during metaphase-I and show a precocious anaphase-I movement. |
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