Qualitative Observation: In Interphase, the cell still had the completed nuclear membrane surrounding the nucleus making it easier to tell apart. In prophase, the nuclear membrane starts to disappear freeing the chromosomes. This makes it harder to distinguish where the nucleus is from compared to the rest of the cell. In metaphase, the chromosomes have gone to the middle of the cell and the spindle fibers attach onto the centromeres. During this time, there will be a darkened line in the middle of the slide this would be the chromosomes lining up. In anaphase, the spindle fibers pull the sister chromatids apart to opposite ends of the cell. In telophase, the cell begins to divide. During this time, you will see the sister chromosomes displaced from the center. You can distinguish telophase apart when the cell wall …show more content…
This result is not surprising because the cell needs time to replicate DNA as well as the other cell organelles. Prophase had the second most number of cells. In prophase, the cell has to turn the loose chromatin into sister chromatids. This phase is also when the nuclear membrane starts to dissolve and when the centrioles move to opposite parts of the cell. Metaphase is when the spindle fibers attach onto the centromeres and the chromatids line up in the center. This part of mitosis was rather fast and this may be because the centroids already started moving to either end of the cell in prophase. In anaphase, the daughter chromosomes are pulled to either end of the cell. This phase ends when the daughter chromosomes are at both ends. There is no big change in this phase other than the fact the sister chromatids separated and moved to either end of the cell. The last phase of mitosis telophase is when the cell actually begins to divide. However, the onion root tip cell is a plant cell so it develops a cell wall in-between the two daughter
During interphase, the cells in both animals and bacteria carry out their division general functions according to the type of their cells. Unlike in plants, a preprophase group of cytoskeletal proteins emerge at a future location of the cell plate. At prophase stage, duplicated chromosomes compress in a way that can be seen with the help of a microscope. On the other hand, the mitotic spindle is formed at one side of nucleus, whereas in plants, spindle is formed around the nucleus. During prometaphase in animals and bacteria, the nuclear membrane disappears, the chromosomes attach themselves to mictotubules and start to move. In plants, however, the preprophase group dissolves while at metaphase stage, the chromosomes get aligned at the core of the cell. At anaphase, there are fewer differences between animals and plants. The chromosomes shift apart towards the both par...
Each cell contains the same genetic code as the parent cell, it is able to do this because it has copied it’s own chromosomes prior to cell death. division. The. Meiosis consists of two divisions whilst mitosis is followed. in one division; both these processes involve the stages of interphase, prophase, metaphase, anaphase, and telophase.
The process of mitosis can take place in either a haploid (23 chromosomes) or a diploid (46 chromosomes) cell. Before a cell can be ready for a mitotic division it must primarily undergo its interphase stage. Following the interphase stage several other stages come into play. These stages are prophase, prometaphase, metaphase, anaphase, and telophase. During each specific stage certain sequences of events take place that assist to the completion of the division.
This means that all the sperm in males and eggs in females are produced from meiosis. Sperm and egg cells are haploid cells-they contain only one of each type of chromosome. Meiosis actually starts with a diploid cell that undergoes two divisions; the end products are four gametes, all genetically different. Meiosis is known as a reduction division because the daughter cells always contain half the amount of chromosomes as the diploid beginner cell. Chromosomes come in pairs and these pairs are called homologous pairs. Homologous chromosomes mean that both of the chromosomes in the pair have the same gene sequence. Human somatic cells(diploid) contain 46 chromosomes consisting of 23 homologous pairs; therefore, human gametes, which are haploid, have 23 total chromosomes-one from each homologous pair. Just like in mitosis, meiosis undergoes all of the same phases. However, because meiosis involves two divisions, the cell goes through all the phases twice. When referring to the first time the cell undergoes a phase, we say 1, and when referring to the second time, we say 2. For example, when a cell starts prophase the first time in meiosis, we say it is going through prophase 1(P1). Also, there are some differences in the process itself. During P1, homologous chromosomes exchange a section of themselves in what is known as crossing over. This provides a source of genetic variation since part of each chromosome switched places with each other, thus making both chromosomes distinct from the original. Another important difference to know is that in anaphase 1, the doubled chromosomes are not separated into sister chromatids. This doesn’t happen until A2 to ensure that each of the four gametes receives one of each kind of chromosome. There are many key points to understand about meiosis. The first being that cells in meiosis do not go through interphase twice. Interphase is a “one-time” thing; DNA
The class attended for my Participant Observation Assignment was a yoga class at the Recreation Center at State University. Such a class is for one session and is forty-five minutes in length. During this class, we covered beginning yoga moves at a slow pace so everyone felt comfortable. The nature of the class consisted of simple yoga moves, serine atmosphere, and relaxing music. Learning theories that were address, applied, and by the instructor wanted us to use were Skinner’s Operant Conditioning, Bandura’s Social Cognitive Theory, and Observational Learning. The instructor also taught using the Direct Instruction Approach and wanted the students to use Lave’s Situated Learning Theory.
The differences between the two phases of meiosis are that in meiosis I, while the cell undergoes the phases, prophase I, metaphase I, anaphase I, and telophase I, it causes the cell to divide into two with each of the cells having a double stranded chromosome. But in meiosis II, it is just the division of the the cells from meiosis I. The ending result being that four haploid daughter
Naturalistic observation is a way of observing applicants in their own natural environment without the contestants realizing the observers are present. My observation took me to different places and settings to complete my assignment where I observed the subjects’ reactions and further relate it with concepts of psychology. This assignment is going to look into the observation at different settings by watching people as they go about their normal activities in their own habitats, and will briefly describe the concepts of superego, egocentrism, operant conditioning, pretend play, and lack of conservation. These concepts are common between the ages 4-6 years of age. The paper will also analyze the interactions using a reflective approach on the psychology of young children.
This statement if for the MU PREP program to further elaborate on my laboratory experiences.
The first phase Prophase is when the DNA coils firmly and becomes visible as a chromosome, next the nuclear membrane and the nucleolus disappears, then the centrioles migrates to the poles, and lastly the spindle begins to finally form. The second phase Metaphase is when the spindle fibers from the centrioles attach to each of the chromosomes, the last thing that happens in this phase is the cell prepares to separate its chromosomes. The third phase Anaphase is when the chromosomes start to separate, the last thing Anaphase does is that the spindle fiber is shortened so the chromosomes can be pulled to the ends of the cells. The last phase in the Mitosis unit of the cell cycle is Telophase in this phase the separation of the chromosomes is complete, the nucleus and nucleolus reforms, then for plants the cell plate forms, and for animals the cleavage furrow forms. The last unit Cytokinesis does not have any phases but is just as important as the others, the first thing that occurs is that the cytoplasm pinches off in the center, lastly two identical daughter cells are
The evaluation form that was used to evaluate a classroom teacher’s performance is a rubric used by the school district (Hillsborough County Public Schools, 2012).
The school that I visited was new. It was the first year of the school opening. The school board had combined two schools into one, so the students had to adjust to their new environments and new individuals. They seemed to be getting along well with each other. Since the school is new the teacher has to adjust to new problems that araise. Times for the subjects and times for using the computer labs change. So the teacher must always be fixable for anything. In this observation of this classroom I learned about the enjoyment of teaching. How you have to adapt to each of the students.
The laboratory experience gives you the opportunity of seeing, touching, smelling, and hearing (but not tasting!) the structures and materials you learn about in class. What you do in the lab helps you correlate the text and lecture with study of real organisms. You will also gain practical experience in dissections and use of the microscope so you can see structures and relationships with your own eyes. In addition you will perform scientific experiments to help you gain an appreciation of the scientific method.
The students that I observed in the classroom were of middle to high school. I went to see 8th, freshman, 10th , and seniors classes, they seemed excited and very curious to why I was there. The middle school was more alive and rambunctious while I observed them. The High school kids were more relaxed, more comical. Some were paying attention while others seemed tuned out to the lecture or involved in socialization with friends within the class. By the end of the class Mr. Hasgil had restored the attention of everyone by using tactics such as history jeopardy with candy as the prize with the high school kids. In both he middle school and high school the kids were mostly Caucasian with a mixture of black, Asian , and Hispanic in the classes.
I attended a second grade class at Smallville Elementary on February 22, 2014; the class began promptly at 0855. There are 26 children in this second grade class. There are 15 male students and 11 female students. The student diversity is 2 Hispanics, 1 African-American, 1 East Indian, and 1 New Zealander (White but with an extreme accent). Three children were left-handed.