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5.1,5.2,5.3
Question | Answer |
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deoxyribonic acid, a molecule that is present in all living cells and that contains the infromation that determines the traits that a living thing inherits and needs to live. | DNA |
In a eukaryotic cell, one of the structures in the nucleas that are made up of DNA and protien; in a prokaryotic cell, the main ring of DNA | Cromosones |
The life cycle of a cell | Cell Cycle |
The period of the cell cycle during wich the activities such as cell growth and protien synthesis occur without visible signs of cell division | Interphase |
In eukaryotic cells a process of cell division that forms two new nuclei each of which has the same number of chromeosomes | Mitosis |
The divition of cytoplasm of a cell | Cytokinesis |
Cromosomes that have the same sequence of genes and the same structure | Homologous Chromosomes |
A process in cell division during which the number of cromosomes decreases to half the original number by two divisions of the nucleus which results in production of sex cells | Meisosis |
reprudoction that does not involve the formation of sex cells and in which one parent produces offspring that are genetically identical to the parent | Asextual Reproduction |
reproduction in which the sex cells from two parents unite to produce offspring that share traits from both parents. | Sextual Reproduction |
The union of a male and female gamete to form a zygote | Fertalization |
Describe the way organisms reproduce Asextual | The four ways are Binary Fission,Budding,Spores,and Vegetable Reproduction. |
The chromosomes in the nucleus of a cell condence. The membrane around the nucleus breaks down | Prophase |
Chromosomes line up in the middle of the cell . Centromeres of the chromosomes are the same distance from each side of the cell. | Metaphase |
The chromatids seperate. They are pulled to oposite sides of the cell. Each side of the cell ends up with a complete set of chromosomes. | Anaphase |
A new nuclear membrane forms around each group of chromosomes. The cell now has two identical nuclei. They become less condensed. Cytokinesis begins during this phrase. | Telophase |
The chromosomes are copied before the meiosis begins. The duplicated chromosomes each made of two chromatids pair up. | Prophase 1 |
After the nuclear membrane breaks down, the chromosomes pairs line up in the middle of the cells. | Metaphase 1 |
The chromosomes seperate from their partners and then move to opposite ends of the cell. | Anaphase 1 |
The nuclear membranes re-form and the cell divides into two cells. The chromatids are still joined | Telophase 1 and Cytokinesis |
The chromosomes are not copied again before meiosis 2. The nuclear membrane breaks down. | Prophase 2 |
The chromosomes line up in the middle of each cell. | Metaphase 2 |
The chromatids are pulled apart and move to opposite sides of the cell | Anaphase 2 |
The nuclear membranes re-form and the cells divide. Four new haploid cells are formed. Each has half the usual number of chromosomes. | Telophase 2 and cytokinesis |