Due to the exclusively maternal inheritance of mitochondria, mitochondrial genotypes can be coupled to a particular nuclear genotype by continuous mating of founder females and their female offspring to males of the desired nuclear genotype. However, backcrossing is a gradual procedure that, apart from being lengthy, cannot ascertain that genetic and epigenetic changes will modify the original ...

Data on the development of nuclear power units for use in spacecraft—nuclear rocket engines and units—are presented. Information creation a reactor unit transport module based megawatt-class propulsion system is provided. The research results are presented, including modeling neutron physics, heat transfer, gas dynamics; testing full-scale mock-ups main assemblies unit; conducting control physi...