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Across 1. A reproductive or resting structure of one or a few cells, often walled or coated 2. Two-stage nuclear division process that halves the chromosome number of a parental germ cell nucleus 4. Cell Cycle, interval between nuclear divisions when a cell increase mass 7. Mature male gamete 8. When cell increase mass and doubles cytoplasm, also duplicates its DNA 10. At prophase I of meiosis. an interaction in which nonsiter chromatids of a pair of homologous chromosomes break at corresponding sites 12. Ringlike depression defining the cutting plane for a dividing animal cell 14. A stage when one member of each pair of homologous chromosomes has arrived at a spindle pole 16. From nuclear division, a splitting of the parent cell cytoplasm 21. Type of immature egg 23. The fusion of a sperm nucleus with the nucleus of an egg, thus forming a zygote 25. Process of Cytoplasmic division in plant cells 26. A stretch of eukaryotic DNA looped twice around a spoll of histone molecules 27. Eukaryotic cells, DNA molecule. duplicated or not, with associated proteins 28. One of two or more molecular forms of a enge that arise by mutation and code 29. Cancer cell of a lineage reproduction established for cancer research 30. A cells collection of DNA and all of the proteins assosiated with it

Down 1. Production of offspring be meiosis, gamete formation, an fertilization 2. Of Meiosis I, stage when all pairs of homologous chromosomes have become positioned at the spindle equator 3. Pressence of two of each type of chromosome 5. Any reproductive mode by which offspring arise from a single parent and inherit the genes of that parent only 6. Animal cell of a lineage set aside for sexual reproduction 9. Structure that gives rise to microtubules of cilia and flagella 11. Haploid cell, formed by meiotic cell division of a germ cell; required for sexual reproduction 13. All Chromosomes in a given type of cell 13. All chromosomes in a given type of cell 15. Type of protein intimately associated with eukaryotic DNA 17. When sister chromatids of each chromosome move to opposite spindle poles 18. Constricted area of a chromosome which has attachment sites for spindle microtubules 19. Any body cell that is not a germ cell 20. Mature female gamete; an ovum 22. Type of nuclear division that maintains the parental chromosome number for daughter cells 24. Unit of information for a heritable trait, passed from parents to offspring