Chapter 11 - Mitosis Introductory Concepts
Draw each phase of mitosis (prophase, metaphase, anaphase, telophase) in a cell that has 2N = 4 chromosomes Show the following in your drawings: chromosomes, kinetochore microtubules, and nuclear membrane Control of the cell cycle Telomeres Mammalian cells typically divide only about 50 times
The Cell Cycle, Mitosis and Meiosis
Simulation of meiosis in a cell where 2N=4 Use beads to construct chromosomes as they would appear in a cell at the start of Prophase I of meiosis (Think - replicated or not?) Simulate homologous chromosomes coming together in synapsis to form tetrads Do not simulate the process of crossing over Does synapsis occur during mitosis?
Mitosis and Meiosis Key Concepts Objectives
with this organism of 2n = 4 How about for humans? 223 223 =8,388,608 combinations IV Oogenesis (e g 2n=4) V Calculating Units of DNA Formula: Example: In an organism that has 2n=8 chromosomes, each chromosome in the G1 phase of the cell cycle has 2 units of DNA (one unit per DNA strand) Using this information, calculate the units of DNA
BIOLOGY Chapter 10: 10th Edition Meiosis & Sexual Reproduction
2n = 4 Four haploid daughter cells 2n = 4 Telophase I Daughter cells are forming and will go on to divide again Telophase Daughter cells are forming Sister chromatids separate and become daughter chromosomes Two diploid daughter cells Their nuclei are genetically identical to the parent cell Their nuclei are genetically MEIOSIS I cont'd
CH 9-3 MEIOSIS
Haploid: n=2 Diploid: 2n=4 Ploidy and chromosome number do not change before/after mitosis PLOIDY PRACTICE 14 Haploid: n=3 Diploid: 2n=6
BS50 Exam Review 1 - Harvard University
The plant Haplopappus gracilis is diploid and 2n=4 There are one long pair and one short pair of chromosomes The accompanying diagrams represent anaphases of individual cells in meiosis or mitosis in a plant that is genetically a dihybrid (A/a ; B/b) for genes on different chromosomes
BIOLOGIA
No gráfico, a mitose propriamente dita e a interfase correspondem, respectivamente, aos períodos de tempo a) 4 a 6 e 1 a 4 b) 2 a 4 e 3 a 5 c) 3 a 5 e 1 a 3 d) 1 a 3 e 4 a 6 e) 2 a 5 e 3 a 5 6 Os esquemas A, B e C abaixo representam fases do ciclo de uma célula que possui 2n = 4 cromossomos a) A que fases correspondem as figuras A, B e C?
Lista de Exercícios: Divisão Celular
e) durante a mitose as cromátides irmãs não se separam 14 (UNICAMP) Os esquemas A, B e C abaixo representam fases do ciclo de uma célula que possui 2n = 4 cromossomos a) A que fases correspondem as figuras A, B e C? Justifique b) Qual é a função da estrutura cromossômica indicada pela seta na figura D? 15
CROMOSSOMOS
Célula hipotética 2n= 4 cromossomos-Cromossomos homólogos se separam: cada conjunto de cromossomos vai para um pólo da célula -Não disjunção dos homólogos (ambos homólogos movimentam-se para um mesmo pólo): algumas doenças Profa Dra Viviane Nogaroto
CHAPITRE 5 LES DIVISIONS CELLULAIRES EUCARYOTES
suite avec une cellule de départ à 4 chromosomes (2n = 4) Cette 2è partie de la méiose est en tous points comparable à une mitose et c'est la raison pour laquelle cette division n’est que la conséquence de la diversité génétique générée par les 2 brassages de la 1ère division réductionnellle La prophase II est brève
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