14. During prophase I the chromosomes and become_. 15. Chromosomes that are the same size and have the same genes are called_. 16. Each half of a replicated chromosome is called a_. 17. Sister chromatids of a chromosome are_. 18. The nucleus_during prophase I. 19. Homologous chromosomes pair up during prophase I to form a_. 20. During metaphase I the tetrads line up in the_of the cell. 21. The homologous chromosomes split up and move toward the opposite ends of the cell during_. 22._independent cells begin to form during_. 23._is the division of the cytoplasm to make two new cells. 24. The 2 new cells that are formed from Meiosis I are_because they contain half of the chromosome of the original cell that started meiosis. 25. At the start of Meiosis I you had 1_cell. 26. Meiosis II must take place because each of our new cells still has too much_. 28. Draw the chromosomes in Meiosis I. Label the cells as diploid or haploid
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During prophase, the chromosomes condense and become visible. Chromosomes that are the same size and have the same genes are called $\textbf{homologous chromosomes}$. Show more…
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Meiosis: Order the stages Place the correct phase of meiosis in the proper sentence. Then list the phases of meiosis in the correct order. Drag the text blocks below into their correct order. Prophase I During metaphase I, the bivalents (pairs of homologous chromosomes) are organized along the metaphase plate. Telophase II Metaphase I As anaphase II proceeds, sister chromatids are separated and are pulled toward the pole to which they are attached. During anaphase I, the homologous chromosomes (paired bivalents) separate from each other. Telophase I Homologues reach their respective poles during telophase I. The nuclear membrane re-forms to produce two separate nuclei. At the beginning of telophase II, homologues have already separated, the nuclear membrane dissociates, chromatids condense, the spindle apparatus forms, and the nucleolus disappears. Prophase Metaphase II During metaphase II, all sister chromatids align themselves along the metaphase plate. Anaphase I During telophase II, sister chromatids reach their respective poles and condense. The nuclear membrane re-forms and nucleoli reappear. Anaphase II Reset
Madhur L.
Identify the stages of meiosis by filling in the blanks, and then rearrange the sentences to place the stages in the correct order starting with prophase I. Sister chromatids separate and are pulled to opposite poles of the cell during ________. Nuclear envelopes reform around two separate haploid nuclei during ________. Chromosomes line up in pairs along the ________ plate during ________. Nuclear envelopes reform around four separate haploid nuclei during ________. The two members of each homologous pair are pulled to opposite poles of the cell while sister chromatids remain attached during ________. A new spindle apparatus begins to form in two separate haploid cells during ________. Synapsis of homologous chromosomes and crossing-over take place during ________. Unpaired chromosomes line up along the metaphase plate during ________.
Sri K.
After careful study of the major stages of meiosis above, apply what you have learned by matching the following written descriptions with the appropriate sketch. Assume that the diploid cell in this model has only one pair of homologous chromosomes (one from a paternal source and one from a maternal source) and crossing over does not occur. Complete the exercise by indicating whether the cell you have matched for the description is diploid or haploid. Diagram Letter | Diploid or Haploid 1. A pair of homologous chromosomes prior to S of interphase in a diploid germ cell 2. While the cell is in S of interphase, chromosomes are duplicated through DNA replication; the two sister chromatids are attached at the centromere 3. During meiosis I, each duplicated chromosome lines up with its homologous partner. 4. During meiosis I, the chromosome partners separate from each other in anaphase I; cytokinesis occurs, and each chromosome goes to a different cell 5. During meiosis II (in two cells), the sister chromatids of each chromosome are separated from each other; four haploid nuclei form; cytokinesis results in four cells (potential gametes)
Caitlyn H.
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