Essential Genetics 6th Edition by Daniel Hartl

Exercise 7

A mutant allele in the axolotl designated o is a maternaleffect lethal because embryos from oo females die at gastrulation, irrespective of their own genotype. However, the embryos can be rescued by injecting oocytes from oo females with an extract of nuclei from either
. Injection of cytoplasm is not effective. Suggest an explanation for these results.