Organisms have groups of tissues called organs, cells have that perform different jobs or functions. a. parts b. organelles c. cytoplasms d. nuclei

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.