Chromosomes

organism), then the cell will move on to step 3: Synthesis. Step 3 is when a cell will begin to replicate its genetic information, or chromatids. These chromatids are bound together by a protein called a centromere and are collectively known as a chromosome. After the synthesis of genetic information takes place, the cell moves on to stage 4: G2. This phase is where the cell begins to replicate its organelles so that the newly

work together to produce a baby dragon. You will simulate meiosis and fertilization, the biological processes by which the parents' genes are passed on to a baby. To begin, we will review meiosis and fertilization for dragons that have only one chromosome with a single gene. This gene codes for the enzyme that makes the pigment that gives dragon skin its color. · The dominant allele, A, codes for a normal enzyme that results in normal skin color. · The recessive allele, a, codes for a defective enzyme

known as Mitosis and Meiosis. Mitosis is the process of asexual reproduction, which means the cell divides into two producing another, with an equal numbers of chromosomes resulting in a diploid cell. Meiosis is a type of cellular reproduction where the numbers of chromosomes are reduced by half, because of the separation of homologous chromosomes, which results in the production of two haploid cells. The main purpose for single celled organisms is to reproduce as tissues, fibers, and membranes begin

draw out and thin, the homologous chromosomes come to lie lengthwise side by side. This process is called synapsis, which means fastening together. Metaphase I occurs when the tetrads align with part of the body. Both sister kinetochores of one duplicated chromosome are attached by spindle fibers to the same pole, and both sister kinetochores of the duplicated homologous chromosome are attached to the opposite pole During anaphase I, the paired homologous chromosomes separate, or disjoin, and move toward

division results in genetically identical daughter cells 3. What is the meaning of genome? Compare your genome to that of a prokaryotic cell. 4. How many chromosomes are in a human somatic cell? 5. Name two types of somatic cells in your body. 6. What is a gamete? 7. Name the two types of gametes. 8. How many chromosomes in a human gamete? 9. Define chromatin. You are going to have to learn the difference between a number of similar-sounding terms. The sketch that looks

caused by an extra or partial chromosome 21,which is called nondisjunction. Nondisjunction happens when chromosomes are distributed incorrectly during egg and sperm formation. Most body cells contain 23 pairs of chromosomes, 23 chromosomes from each parent, adding to 46 chromosomes. When you have an extra chromosome it adds to 47, causing down syndrome. When the egg meets the sperm to form a normal embryo, the embryo gets three copies of chromosome 21. After that the chromosome is copied to each cell as

equal number of chromosomes in each of the diploid cells each with identical nuclei. Meiosis: Meiosis is a sexual cell reproduction process whereby a single cell divides its homologous chromosomes equally to form two haploid cells with half the chromosomes of the parent cell. Process Mitosis: Mitosis occur in five phases describing the changes through which the cells go through. These stages are prophase, prometaphase, metaphase, anaphase, and telophase. In prophase, the chromosomes condense inside

Introduction: Turner syndrome is developed when there is a missing or incomplete X chromosome. This condition can only occur in females. The female patients that suffer from Turner syndrome either has only one X chromosome, but one of them appears to be incomplete. Turner syndrome occurs in one out of twenty-five hundred births (Science Daily, 2004). • Physical: Female patients with the disorder are generally shorter than one who does not have the disorder. They also have a stocky build, arms that

Some researches believe the XYY chromosome is to be considered the “criminal” Chromosome. R. G. Fox suggests a longitudinal study be done to verify this because the information that is currently provided is not enough to confirm whether or not the XYY chromosome could be linked to aggression, below-average intelligence, or Antisocialism. I think if there were a way for scientists to identify whether or not a violent gene exists I would not want to know about it. I think that if I knew someone

missing your 5th chromosome. Cri du chat, or 5p syndrome is not inherited, but is a random event. Doctors cannot treat or heal patients with 5p syndrome but there is therapy. There are numerous symptoms. It’s found in all cultural backgrounds and happens in every 1 to 50,000 newborns. Origin of Discovery: The discovery of 5p syndrome is rather complicated and interesting. It was discovered by researcher by the name of Jerome Lejeune in Paris in 1963. He was studying the chromosomes linked to down