mitosis in an animal cell with two chromosomes. (20) Answer Question 11.6: Tabulate the key differences between mitosis and meiosis. (14) Answer: Mitosis Meiosis DNA replication occurs during DNA replication occurs during interphase before mitosis begins interphase before meiosis 1 begins One division Two divisions Synapsis does not occur Synapsis occurs during prophase 1 Two daughter cells‚ each 2n and Four haploid cells‚ each containing half genetically identical to parent cell as
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During the production of sex cells (gametes) in animals In spore formation which precedes gamete production in plants Haploid gametes (sperm ovum) - sexual reproduction DNA in a cell replicates only once‚ but cell divides twice The Cell Cycle Interphase G1: Protein synthesis and growth (10 hours) Preparation for DNA replication (e.g. growths of mitochondria) Differentiation‚ only selected genes are used to perform different functions in each cell S: DNA Replication (9 hours) G2: short gap
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LESSON #9 22a) There would be 3 chromosomes present in each of the cells that make up the stomach of mosquito. 22b) Interphase | b | Prophase | C | Metaphase | D | Anaphase | A | Telophase | E | 22c) There would be 3 chromosomes present in the sperm cells of a mosquito. 22d) Interphase | C | Prophase 1 | A | Metaphase 1 | I | Anaphase 1 | E | Telophase 1 | F | Prophase ii | H | Metaphase ii | B | Anaphase ii | G | Telophase ii
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tissues. Tissue Type # Cells in Interphase # Cells in Prophase # Cells in Metaphase # Cells in Anaphase # Cells in Telophase Lung Tissue Sample 1 19 0 0 1 0 Lung Tissue Sample 2 19 1 0 0 0 Stomach Tissue Sample 1 16 0 1 0 2 Stomach Tissue Sample 2 19 0 0 1 0 Ovarian Tissue Sample 1 18 0 1 2 0 Ovarian Tissue Sample 2 19 0 0 1 0 Table 2: Record your data for the number of cells in each stage of the cell cycle observed in cancerous tissues. Tissue Type # Cells in Interphase # Cells in Prophase # Cells
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1. Why are spindle fibers important for mitosis? (5 points) Spindle fibers work as a path for chromosomes to travel(Campbell‚ 2009). 2. State the four bases that make up DNA. (4 points) a. (A)-Adenine b. (G)-Guanine c. (T)-Thymine d. (C)-Cytosine (Campbell‚ 2009). 3. What are the two base pairs? (2 points) a. AG b. CT 4. Answer the following questions: a. Define the term crossing over. (3 points) The phase in meiosis where chromosomes exchange segments of genetic materials (Campbell‚ 2009). b. Explain
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Julie Lake November 8‚ 2012 BIO 111‚ C11- Online Villalpando‚ Shawn Lab 8 Title: Mitosis and Meiosis Exercise 1: Mitosis in Animal and Plant Cells Questions: A.) What is the purpose of mitosis? The purpose of mitosis is to create or produce more cells for a living organism. Mitosis occurs when genetic substance in the nucleus divides or separates in order to create more cells. Cytokinesis normally occurs next and the single cell develops into two separate cells. This same process continues
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| |Nuclear membrane |Holds all the genetic materials within the nucleus. |Outer layer of the nucleus | |Chromatin |During interphase‚ the genetic material is called chromatin. |Found within the nucleus.
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same number of chromosomes N = Haploid Number (23 in humans) 2N = Diploid number (46 in humans) Cell Division: Mitosis: Occurs only in Somatic Cells Daughter cells are identical to parent cell Purpose: GROWTH‚ REPAIR‚ and REPRODUCTION Interphase: Cell grows and DNA duplicates. Prophase: Chromatin condenses and Nuclear membrane dissolves. Metaphase: Chromosomes lines up on the equatorial plate (middle) Anaphase: Sister chromosomes are pulled to opposite poles by spindle fibres Telophase:
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Botany Lab Introduction to Microscope Circa 1000 AD. = the first vision aid was invented (inventor unknown) called a reading stone. Circa 1284= Italian‚ Salvino D’ Armante is credited inventing the first bearable eye glass. 1590= two dutch eye glass makers‚ Zaccharias Janssen and Hans Janssen experimented with multiple lenses. 1665= English Physicist‚ Robert Hooke looked at a silver of cork through a microscope lens and noticed some “pores” or “cells”. 1674= Anton Van Leeuwenhoek built
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Unit 3 Growth & Heredity Exam Review & Study Guide WHAT SHOULD I KNOW ABOUT… DNA STRUCTURE‚ DNA REPLICATION‚ Tx‚ Tl‚ MUTATIONS‚ CELL CYCLE‚ MITOSIS‚ MEIOSIS‚ MENDELIAN GENETICS Review/Use the following: Vocab lists‚ ISN Pages‚ Practice Questions‚ Lectures‚ Book Chapters 12‚ 9‚ 10 DNA STRUCTURE 1. What role did Rosalyn Franklin play in our understanding of DNA’s structure? She discovered the double-helix position of the DNA. 2. What role did James Watson & Francis Crick play in our understanding
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