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| Description: (a) Male Drosophila of the P cytotype crossed to females of the M cytotype produce F1 progeny that are largely infertile due to mutations resulting from P element transposition. (b) Crosses of P-cytotype females to males with either the P or the M cytotype yield F1 progeny of normal fertility (a) Male Drosophila of the P cytotype crossed to females of the M cytotype produce F1 progeny that are largely infertile due to mutations resulting from P element transposition. (b) Crosses of P-cytotype females to males with either the P or the M cytotype yield F1 progeny of normal fertility (a) (b) P Cyto’type M Cyto’type M CY’EOtyPe P Cyto’type (chromosomes (chromosomes (chromosomes (chromosomes carry P-elements) lack P—elements lack P-elements) possess P-elements and tra nsposition- and transposition- repressing protein) repressing protein) Pa re nta l generation F1 hybrids Sterile wild type Normal fertility l l lFew or no progeny, due F2 progeny I lto F sterility caused by . Ihybrid dysgenesis ) / 3.», (\ Wild-tvoe offspring Picture Stats: Views: 47 Filesize: 243.55kB Height: 1477 Width: 1578 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=49247 |