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| Modern Genetic Analysis Chapter 4. The Inheritance of Genes Inheritance of Organelle Genes Figure 4-29. Explanation of the different results from reciprocal crosses of poky and normal Neurospora. The parent contributing most of the cytoplasm of the progeny cells is called female. Brown shading represents cytoplasm with the poky determinants. The nuclear locus with the alleles ad+ and ad is used to illustrate the segregation of the nuclear genes in the expected 1:1 Mendelian ratio.

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