![]() ![]() During this phase, the spindle apparatus begins to. The centrosomes have replicated and are moving toward the poles.Īgain, the chromosomes are not yet attached to the spindle apparatus, which is growing outward from the centrosomes. In prophase the nuclear membrane disappears and the chromosomes spread out to fill up much of the cell. Anaphase II: The chromosomes are split in half and move to the. Chromatin strands condense & coil, appearing as linear structures attached. together and wrap around each other so closely that portions of one switch. If there was an interkinesis, then the nuclear envelopes begin to break down again during this stage. Cell Cycle Division: Part 2 Meiotic Bead Diagrams (With Crossing Over) Prophase I: One chromosome from mother one from father come. During this stage of spermatogenesis, the cells are called secondary spermatocytes, or during oogenesis, secondary oocytes. As in prophase I, the chromosomes are condensed. Prophase I is the longest phase of meiosis and is further sub divided into 5 phases: Leptotene : Condensation makes chromosomes become distinct and compact. ![]() Prophase II, the first step of meiosis II, begins with the two daughter cells produced by the first meiotic division (see figure right). Prophase II Note: Meiosis II is very similar to mitosis, except that during meiosis II only one member of each chromosome homolog pair is present, whereas in mitosis both are (it will help you remember this if you pronounce mitosis - only in your own mind! - as "my- TWO-sis"). In order to show the content you need to change your cookies preferences to allow Performance Cookies and Targeting Cookies. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |