Meiosis

Plant Hormones: DIAGRAMS/PICTURES NEEDED: Hormone Locations (color coordinated and showing relative concentrations) Auxin- Auxin is a hormone that’s main function is to promote cell elongation in stems, buds and roots and also plays a small part in the differentiation or new cells. Auxin is present in high concentrations in germinating fruits and seeds, but it is not yet known whether this high concentration of auxin is passed on from the mother or whether is is created but the developing…

Science is part of an everyday life. The field of genetics can impact someone’s health, political view, faith, and job. Every day, society is expanding the applications of such potentials to cure genetic disorders, modify organisms, and identifying criminals. Every year, there are over eight million children born with a serious disorder that is caused by genes. “The most common genetic defects include heart disorders, Down syndrome and incorrectly formed backbones and brains. They also include…

take care of the person at their house, or the baby with Trisomy18 will spend time being taken care of at a NICU, or Neonatal Intensive Care Unit. Some ways Trisomy18 is not inherited is if the mother is at an abnormal age to have a baby, or during meiosis if an egg or sperm has…

Mitosis I chose to do mitosis in my science project because i knew about mitosis more than the other topics on the list of options. In my project, i modeled mitosis with styrofoam balls, paint, and clay. I modeled the steps prophase, metaphase, anaphase, telophase, and cytokinesis . I modeled the steps by cutting the styrofoam balls in half, painted them and I put the clay models of organelles inside the styrofoam cell i made. I made skin cells as the type of cells i am using for my model, by…

between Prokaryotes and Eukaryotes, is that Prokaryotes have smaller cells and Eukaryotes have larger, Eukaryotes is multicellular, the DNA is circular in Prokaryotes, Ribosomes wise the Eukaryote is larger, the cell division for Eukaryotes are by Meiosis and Mitosis, Prokaryotes have variety of metabolic pathways, reproduction is always asexual for Prokaryotes but for Eukaryotes is asexual or sexual and also has cytoskeleton but Prokaryote does not have.…

Background: What is Down Syndrome? Down Syndrome is a chromosomal disorder caused by an error in cell division that results in an extra twenty-first chromosome, that causes birth defects of developmental and intellectual delays. The human body is composed of trillions of cells and within the nucleus of each cell are structures called chromosomes (Parks, 2009). About eight million babies are diagnosed with Down Syndrome in the United States with approximately twenty thousand in Western Europe…

The 23rd pair of chromosomes, referred to as Group X, contain the sex cells that decide the gender of the organism. If a Y chromosome is present, the organism is male, and if not, it is a female. If the chromosomes fail to separate correctly during meiosis (type of cell division that results in sex cells), the chromosomes are not distributed evenly, and is called nondisjunction. This can lead to disorders, such as the Klinefelter’s Syndrome, which is caused by nondisjunction, has symptoms and…

Write neatly and legibly. Copyright reserved Please turn over Life Sciences/P1 3 NSC DBE/Feb. – Mar. 2011 SECTION A QUESTION 1 1.1 Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A – D) next to the question number (1.1.1 – 1.1.6) in the ANSWER BOOK, for example 1.1.7 D. 1.1.1 The process in which male gametes are formed in humans is called … A B C D 1.1.2 When the first…

Mutations and errors in sexual reproduction allow for variation within a population. These variations can eventually lead to the complex process of evolution in a species. The genetically derived mutation Polycythemia and the environmentally derived mutation lip augmentations, affect human evolution in a beneficial and detrimental way. Evolution is change in the aspects of a certain species over a period of time. This is caused by mutations which are variations or differences in the genome. Both…

embryo are not genetically identical. Meiotic recombination shuffles the genes between the two chromosomes in each pair (one received from each parent), producing recombinant chromosomes with unique genetic combinations. This gene reshuffling during meiosis has a significant influence on the creation of genetic diversity among the plants obtained from seed germination. The peak profiles of F–RAPD and F–ISSR of Coelogyne plants micropropagated from secondary PLBs as explants show genetic…