Patterned disjunction in Drosophila melanogaster. I. Assortment of SPA
pol
/+ and X,Y in the stock N1 |
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Authors: | L T Douglas M E van Meekeren |
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Institution: | (1) Department of Genetics, University of Nijmegen, Nijmegen, The Netherlands |
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Abstract: | N1 (= Nijmegen 1) ![male](/content/n5730609187k7h25/xxlarge9794.gif) D. melanogaster heterozygous for sparkling poliert (4) (= pol, here) were backcrossed as single pairs. When ![male](/content/n5730609187k7h25/xxlarge9794.gif) were not selected for departure from 1/1, pol/pol
+, many exceptional ratios were observed even though the net for all 67 pairs was approximately one-to-one; in the same experiment a net excess of ![male](/content/n5730609187k7h25/xxlarge9794.gif) was observed. In a second experiment ![male](/content/n5730609187k7h25/xxlarge9794.gif) were selected for departure from 1/1, pol/pol
+ratios. The net pol/pol
+ratios became significantly different from the 1/1 expected but the sex ratio approached normal. Lineage of the males in the second experiment were recorded and displayed as pedigrees. These together with tabulated data suggest that in some pairs, one of the four categories pol ![female](/content/n5730609187k7h25/xxlarge9792.gif) , pol ![male](/content/n5730609187k7h25/xxlarge9794.gif) , pol
+![female](/content/n5730609187k7h25/xxlarge9792.gif) , pol
+![male](/content/n5730609187k7h25/xxlarge9794.gif) may be significantly greater or less than 1/4 of the total offspring recovered. |
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Keywords: | |
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