* Meiosis – cell division for gamete production * In specialized tissues * Produces cells with the 1n chromosome number * Two Divisions * Meiosis I separates homologous chromosomes * Meiosis II separates sister chromisis * Asexual Reproduction * Mitotic division * Identical offspring * Sexual Reproduction * Fuse gametes from parents (syngamy) to produce a zygote * Each parent contributes half the genetic material * Increase the diversity of
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JENNY COSTE This is the case of Jenny Coste‚ 9 years old and was diagnosed with Acute Lymphoblastic Leukemia. She complains pain in her legs and loss of appetite early July of 2013. She plays sports in her school and her family thought it might be the cause until she feels tired all the time and does not want to participate in school activities. Her symptoms become severe and decided to see the doctor. In early September of 2013‚ they visit their General Practitioner‚ Dr. Brown and she was observed
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The Cell Cycle A eukaryotic cell cannot divide into two‚ the two into four‚ etc. unless two processes alternate: doubling of its genome (DNA) in S phase (synthesis phase) of the cell cycle; halving of that genome during mitosis (M phase). The period between M and S is called G1; that between S and M is G2. So‚ the cell cycle consists of: G1 = growth and preparation of the chromosomes for replication; S = synthesis of DNA [see DNA Replication] and duplication of the centrosome; G2
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Cell Cycle Describe how major events of cell division that enable the genome of one cell to be passed on to two daughter cells. List the phases of cell cycle and describe the sequence of events that occurs during each phase. There are two main stages of the cell cycle‚ with multiple subdivisions within each. Interphase is the first stage‚ and it’s composed of G1 (contents of the cell are duplicated sans the chromosomes)‚ S (chromosomal duplication)‚ and G2 (checkpoints) phase. After interphase‚
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GUIDED READING - Ch. 15 - CHROMOSOMAL BASIS OF INERITANCE • • NAME: ________________________ Please print out these pages and HANDWRITE the answers directly on the printouts. Typed work or answers on separate sheets of paper will not be accepted. Importantly‚ guided readings are NOT GROUP PROJECTS!!! You‚ and you alone‚ are to answer the questions as you read. You are not to share them with another students or work together on filling it out. Please report any dishonest behavior to your
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EXAM1 Q1. How many chromosomes are in a typical red blood cell taken from a normal person? Zero Q2. The degree to which a trait is expressed in individuals is the expressivity of the trait. Q3. In pedigrees‚ a male individual is symbolized as a square. Q4. The chromosomal structure that anchors the spindle fiber to the chromosome is centromere. Q5. The short arm of a submetacentric chromosome is symbolized as the p arm. Q6. Genetic diseases transmitted only by a mother to both sons and daughters
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Mendel’s ‘factors’ are now called genes Genotype refers to the specific allelic composition of an individual Independent assortment: During gamete formation‚ the segregation of any pair of hereditary determinants is independent of the segregation of other pairs Random sampling error N+N sperm N egg 3n endosperm Degrees of freedom Tetrad (bivalent) Mitosis produces daughter cells that are genetically identical Meiosis produces daughter cells that are not genetically identical
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According to the Center of Disease Control and Prevention‚ there are “detectable levels of BPA in 93% of 2517 urine samples from people six years and older”. BPA‚ the abbreviated form of Bisphenol A‚ is an endocrine disruptor. It’s usage first began in the 1960s as an ingredient in plastics. The most common plastics it is used in are polycarbonate plastics (which include food and beverage containers‚ as well as plastic water bottles) and epoxy resins (coats the inside of food cans‚ also found in
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BI 111 Study Guide Exam #1: Some of Ch. 4‚ the brief discussion summarizing Ch. 6‚ and Chptrs. 5‚ 7‚ and 8 HOW TO USE THIS STUDY GUIDE: You should be able to provide fairly detailed answers to the following questions and directions… this means you will probably use more room than is provided by the small spaces between them. Some of those answers will include things I talked about in lecture‚ as well as concepts that are explained by your textbook. You may want to reformat the guide on
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REVIEW FOR TEST 4: GENETICS CHAPTER 12 -1406 CHAPTER 8- 1408 MITOSIS 1. Define: genome‚ gene‚ chromosomes‚ chromatin‚ binary fission‚ homologous chromosomes‚ sister chromatids‚ daughter chromosomes‚ somatic cells‚ gametes‚ centromere‚ kinetochore‚ karyokinesis‚ spindle fibers‚ kinetochore microtubules‚ nonkinetochore microbules‚ centrosome‚ asters 2. List differences between eukaryotic and prokaryotic genome. 3. A chromosome consists of ____ (60%) and ____ (40%).
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