Control experiments - an experiment in which the variable factors are controlled so as to make it possible to observe the results of varying one factor at a time. Qualitative descriptive research (case studies) – Ultimate goal is to improve practice. This presupposes a cause/effect relationship between behavior and outcome; however‚ this method will ONLY let you hypothesize about variables and describe them. When you move to show correlation among them‚ you’re doing quantitative work. But remember
Premium Chromosome Biology Species
Genetic Project: Down Syndrome What is Down Syndrome? Down Syndrome is a chromosomal disorder where a child is born with an extra partial or full chromosome 21‚ thus leading to the over-expression of many genes present on this extra chromosome. Therefore‚ it is neither dominant nor recessive. Down Syndrome affects about 1 in 700 babies born‚ making it one of the most common genetic birth defects in the United States. There are actually 3 different types of Down Syndrome‚ Trisomy 21 (Nondisjunction)
Premium Down syndrome Chromosome Gene
have half the chromosome number of the parent cell. Mitosis is best observed in cells that are growing at a rapid pace‚ such as in the onion root cell tips or at Drosophila giant chromosome. The root tips contain a special growth region called the apical meristem where the
Premium Mitosis Chromosome Eukaryote
microscope to examine the size‚ shape‚ And number of Chromosomes in a sample of body cells. Extra‚ missing‚ Or abnormal positions of chromosome pieces can cause problems with a persons growth‚ development‚ and body functions. In karyotyping‚ the chromosomes in a cell are stained with a dye to make the bands of each chromosome visible. Banding helps show differences in structure among the chromosomes and helps arrange them into pairs. The chromosomes are then photographed through the microscope. The
Premium Cell nucleus Microscope Chromosome
in which a cell breaks apart its chromosome to eventually produce two identical daughter cells. The cell spends 10% of its time in mitosis. The cell goes through four stages in order to complete this task. The stages are Prophase‚ Metaphase‚ Anaphase and Telophase. Mitosis only occurs in eukaryotic cells and the process is different for different species. Mitosis is fast and very complex. The first phase is Prophase. In prophase‚ the chromosomes the chromosomes start to coil‚ shorten‚ and become
Premium Mitosis Chromosome Cell cycle
Crossing over- The two chromosomes making up a homolog pair are not genetically identical because homologs are inherited from different parents. When the chromosomes synapse during prophase 1‚ each gene in each chromosome is brought into contact with the same gene on that chromosome’s homolog. During this process of synapses the two chromosomes of each homolog pair exchange segments of DNA in a process called crossing over. The gene combinations on a chromosome can be changed. For example‚ suppose
Premium Mitosis Meiosis Chromosome
components of eukaryotic chromosomes and sister chromatids. Describe the phases of the eukaryotic cell cycle. Describe the events that take place during interphase. Summarize events that occur during the five phases of mitosis. Compare cytokinesis in plants and animals. Understand the function of meiosis in sexual reproduction. Distinguish between germ-line and somatic cells. Describe how homologous chromosomes pair during meiosis. Describe the behavior of chromosomes through both meiotic divisions
Premium Cell cycle Mitosis Chromosome
1 – Mitosis and Meiosis 1. A certain species has three pairs of chromosomes: an acrocentric pair‚ a metacentric pair‚ and a telocentric pair. Draw a cell of this species as it would appear in metaphase of mitosis. (BAP 2.18) 2. A cell in G1 of interphase has 12 chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the following stages? (BAP 2.20) a) G2 of interphase b) Metaphase I of meiosis c) Prophase of mitosis d) Anaphase I of meiosis
Premium Chromosome Mitosis Meiosis
Application of Molecular Techniques for Detection of Disease Resistant Genes in Tomato Breeding Lines for Guatemala Objectives: 1. Evaluate and modify methods for detection of Fusarium Race 2 resistance gene. 2. Evaluation of two step protocol for detection of Mi-1 gene. 3. Verification of marker for Ty-1 and evaluation for marker in Guatemala breeding lines. (This is a Geminivirus that is transmitted by the whitefly) 4. Use of molecular markers to detect geminivirus resistance source for Gu143
Premium Polymerase chain reaction Chromosome Gene
A Semi-Detailed Lesson Plan in BIOLOGY Date: January 22‚ 2013 Time: 7:30-8:30 Section: BSEd-2B I. Objective(s) At the end of the 60-minute period‚ at least 75% of the student’s should be able to: 1. Differentiate prokaryotic from eukaryotic cells. II. Subject Matter a. Topic: Prokaryotes and Eukaryotes b. References: b.1. Department of Education. 2002. Operations Handbook in Biology: 2002 Basic Education Curriculum Secondary Level. II. 1. 1.4. b.2. Department of Education
Premium Bacteria Eukaryote Archaea