chromosomeschromatid23sexualnucleusgenesdominantmitosisspermcellasexualprophasednaoffspringgametesanaphasetraitspunnettsquarefertilizationheredityeggcellrecessivemetaphase46guineapigschromosomeschromatid23sexualnucleusgenesdominantmitosisspermcellasexualprophasednaoffspringgametesanaphasetraitspunnettsquarefertilizationheredityeggcellrecessivemetaphase46guineapigs