Tut 10 - Mitosis _ Meiosis (Student)

St Andrew’s Junior College Genetics and Inheritance / Mitosis and Meiosis 2020 H1 Biology 1 Full Name: Civics group: 21S Index no.: Date: Core Idea 2: Genetics & Inheritance Mitosis and Meiosis Tutorial 10 Record your answers below: 1 2 3 4 5 6 7 8 1 Which set of terms matches the definitions in the table? Definition the structure that replicates in the S phase in animal cells, the ‘pinching in’ process that divides the cytoplasm the cell structure that disintegrates to allow chromosome attachment to the spindle the phase of the cell cycle immediately prior to entering mitosis A centriole cytokinesis nuclear envelope S phase B centriole late telophase nucleolus S phase C chromatid cytokinesis nuclear envelope G2 phase D chromatid late telophase nucleolus G2 phase 2 When human cells undergo mitosis, two daughter cells are produced. Which essential organelles must be supplied to each daughter cell? 1 a pair of centrioles 2 some mitochondria 3 some lysosomes 4 a small quantity of rough endoplasmic reticulum A 1, 2, 3 and 4 B 1, 2 and 3 only C 1, 2 and 4 only D 3 and 4 only

St Andrew’s Junior College Genetics and Inheritance / Mitosis and Meiosis 2021 H1 Biology 3 If 2 DNA molecules have the same length, centromere position, genes but different alleles, they are likely to be _______________________. A sister chromatids B homologous chromosomes C duplicated chromosomes D non-sister chromatids 4 X units of DNA is present in a somatic cell. What is the relative amount of DNA present in each daughter cell if the parent cell undergoes mitosis and meiosis respectively? Mitosis Meiosis A X/2 X/4 B X X/4 C 2X X D X X/2 5 The diagrams show the cell cycle of a cell involved in asexual reproduction and the arrangement of two pairs of its chromosomes at different stages of the cycle. Which combination represents the correct match between stage of cell cycle and arrangement of chromosomes? stage of cell cycle arrangement of chromosomes A prophase Z B anaphase Y C metaphase X D telophase W

St Andrew’s Junior College Genetics and Inheritance / Mitosis and Meiosis 2021 H1 Biology 6 Vincristine is a drug used in chemotherapy to treat cancer which results from uncontrollable cell division. Vincristine binds with tubulin molecules in spindle fibres and prevents them from behaving normally. During cancer treatment with vincristine, which stage of the mitotic cell cycle is affected and prevents the cancer cells from multiplying? A crossing-over in meiosis B cytokinesis after mitosis C formation of bivalents during meiosis D separation of chromatids during mitosis 7 The statements are about meiosis. 1 Homologous pairs of chromosomes form bivalents and cross-over. 2 Chromatids of homologous chromosomes undergo independent segregation. 3 Crossing-over occurs between chromatids of non -homologous chromosomes.