Chromosome

Metaphase I (MI) (Assembly of meiotic apparatus) During Metaphase I, Chromosomes move together along the metaphase plate. DNA replication, repair spindle function, and chromosome segregation are controlled by regulatory mechanisms of spindle assembly checkpoints (Elledge, 1996). The cellular spindle apparatus includes the spindle microtubules, associated proteins, and any centrosomes or asters present at the spindle poles. The dynamic lengthening and shortening of spindle microtubules (Mitchison…

We are began as a single cell, but by the time that we are an adult, we have trillion of cells in our body. This happen because our cells are constantly dividing and when they divide they make new cells. A group of cells form a tissue, a tissue form the organ, an organ compound the system of organ and then the individual. We all have this question, why our cells are dividing constantly? Cells divide to replace old or damaged cells, and also living organism can grow and reproduce. There are two…

is 50%, as stated by “rarediseases.info.nih.gov” updated in 2016. Since FFI is passed on throughout generations, if a parent has two children, one of them is almost guaranteed to get FFI, except for in rare cases. The mutation occurs in the 20th chromosome which leads to other problems in th body. FFI doesn’t lead straight to death, there are multiple things leading up to the final stage. In most cases, a person gets FFI from an infected parent. If two parents produce offspring and one has FFI,…

Cell division occurs rapidly in growing bulbs, sprouting seeds, and growing root tips. The reason that onion root tips are most commonly used to study mitosis. Onion root tip cell possesses eight chromosomes, whereas a human has 46 chromosomes. Another factor is that the stages can easily observe, and onion root tip can be flattened. The roots continue to increase as the roots search for water and nutrients. Regions of growth are good for studying because given time…

genetically different. Crossing over, which is the process of the exchange of genetic material between homologous chromosomes, only occurs in meiosis during prophase I, because homologous chromosomes are not present in mitosis. In mitotic metaphase, individual chromosomes composed of two identical sister chromatids line up in the middle of the cell, but in metaphase I, homologous chromosome pairs, which consist of four genetically different sister chromatids, line up in the middle of the cell.…

are lucky. Trisomy18 is when a baby is still inside the mother's stomach and when developing the baby's cells do not divide correctly which causes cardiac, or heart, lung, and whole body problems to appear. Trisomy18 is caused when chromosome 18 has three chromosomes instead of the two it is suppose too have. The symptoms of this disorder may include clenched hands, crossed legs, rocker bottom feet; or rounded feet, a low birth weight, low set ears. They might also have a small head and jaw,…

Mitosis is a process of cell division resulting in two genetically identical daughter cells developing from a single parent cell. Meiosis is a type of cell division resulting in the production of sperm or eggs that have half the chromosomes of the parent cell. Mitosis and meiosis are similar in a way that they are both ways in which cells reproduce. Mitosis and Meiosis both occur in humans and animals. In both cases (Mitosis and Meiosis), cells copy DNA and make new cells based on the…

1. Why do you think the roots of plants are good for studying Mitosis? In my biased opinion, I believe that the roots are suitable for studying mitosis because plants always undergo mitosis. 2. Why does the root tip of the onion need to be stained? The root tips of the onion need to be stain because they provide more visibility when looking under a microscope. 3. How many phases are in the Cell Cycle? There are five stages of the cell cycle which would be Interface, Prophase, Metaphase,…

a part of the cell cycle in which chromosomes in a cell nucleus are separated into two identical sets of chromosomes, and each set ends up in its own nucleus. Mitosis is composed of several different components: Interphase, Prophase, Metaphase, Anaphase, and Telophase. Interphase is the stage that happens right before mitosis, this is where a typical cell spends most of its life. In the prophase stage of mitosis, the first stage of cell division, the chromosomes become visible as paired…

DEFINCIENCY OF ENZYME beta- hexosaminidase A CAN CAUSE TAY-SACHS DISEASE DEFINITION: Tay-sachs disease is a rare genetic disorder found commonly in isolated genetic such as Jewish Population. This is also known as a fatal genetic lipid storage disorder in which harmful quantities of cell membrane components named ganglioside accumulate in the brain stem cells, eventually leading to the premature death of cells. II. SYMPTOMS: Diagnosis can be confirmed either by enzyme analysis or mutation…