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dna diploid haploid mutation protein synthesis mendel inherintance x chromosome genes sex linked independent assortment dihybrids segregation dominance inheritance cell beginning homozygous genetics family tree pedigree crick watson molecule replication translation transcription homologous chromosomes heredity dynamics earth continental drift alfred wegener beginning of cell biology measuring cells micrometers trophic relationships carrying capacity biotic potential symbiosis mutualism relationships; predation competition biodiversity environmental factors ecological niche beginning of evolurionary theories theory of natural selection evidence of evolution speciation present day evolutionary theories gene expression. mrna translation dna transcription non-mendelian gentetics heterozygous