MO x M

all normal

Figure 2.13

The genetics of Drosophila embryonic development

The phenotypes of offspring depend on either the maternal genotype for maternal effect genes (top) or the offspring (zygotic) genotype for zygotically required genes (bottom). M, Mutant; +, wild type.

all mutant phenotype

Zygotically-required genes Parents

Offspring

0 0

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