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This Concept Map, created with IHMC CmapTools, has information related to: Chapter 13, phenotype crossing over can produce different phenotypes crossing over, fertilization resulting from fertilized eggs or zygotes. when two gametes such as these fuse... chromosomes numbers jump from 23 to 46., metaphase I= chromatids of homologue attatched to kinetochore microtubules from one pole and others attatched to opposite pole. next anaphase I= chromosomes move to poles guided byspindle apparatus. sister chromatids attatched to centromere and move to pole. homologous chromosomes move to opposite poles, metaphase II= chromosomes on metaphase plate, kinetochores of sister chromatids are attatched to microtubules extend to opposite poles. next... anaphase II= centromeres of each chromososme seperate and sister chromatids come apart. sister chromatids of each chromosome now move as 2 individual chromosomes toward opposite poles., meiosis I contains the folowing steps: prophase I= chromosomes condense, homologous chromosomes align gene by gene, non-sister chromatids break and rejoin to other's DNA. Synaptonemal complex forms between homologues, then it disassembles. Tetrads criss-cross, spindle microtubules form, nuclear envelope breaks down. Kinetochoresattatch to microtubules from one pole to the next, then pairs move towards the metaphase plate., they pass on genes of both parents to the offspring done in two ways... sexual reproduction: two parents give offspring unique combinations of genes inherited from the two parents, Gametes sexual life cycles which are... reproductuive sex cells, sexual reproduction: two parents give offspring unique combinations of genes inherited from the two parents this process keeps... Lifecycles going, crossing over occurs during meiosis I, reproductuive sex cells other type of cells... somatic cells: cells other than gametes, anaphase II= centromeres of each chromososme seperate and sister chromatids come apart. sister chromatids of each chromosome now move as 2 individual chromosomes toward opposite poles. next... telophase II and cytokinesis= nuclei form, chromosomes decondense, and cytokinesis occurs. meiotic division occurs and 4 daughter cells form from one parent cell., Heredity 2 Types... variation, Gametes sexual life cycles if gametes were made by mitosis... then the chromosome number would jump from 46 to 92 and th eproces would keep accumulating., Meiosis II contains the following steps: prophase II= spindle apparatus forms chromosomes move toward the meaphase plate., Meiosis! results in... half the number of chromosomes than the original cell had., sexual lifecycles can help.... track the behavior of chromososmes., Lifecycles going different type of lifecylce is... sexual lifecycles, Heredity units are... Genes, Genes are carried from one generation to the next by... Gametes sexual life cycles, Genes contain coded information given to offspring by parents.