BIO 101/102 Laboratory Review 5 1. 2. -3, During what stage of the cell cycle do
ID: 196076 • Letter: B
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BIO 101/102 Laboratory Review 5 1. 2. -3, During what stage of the cell cycle does DNA replication What happens to sister chromatids during anaphase of mitosis? when are organelles like mitochondria daughter cells? up between and endoplasmic reticulum divided If aters are observed in cells undergoing mitosis, are the cells animal or plant cells? move and forms during prophase? what is the structure called that helps chromosomes During what phase of mitosis does the nuclear envelope re-form and the nucleolus reappear? What structure gives rise to new plant cell walls? what kind of nuclear division must occur prior to sexual reproduction to ensure that 7. & - offspring are 2n? what do we call the chromosomes that look alike and carry genes for the same traits? -9, -10, what is the exchange of genetic material between nonsister chromatids called? - 11. During what phase does crossing-over occur? 12. During what phase do homologues separate? 13, If a parent cell has 48 chromosomes, how many des each daughter cell have at the end of meiosis I1? 14, what kind of nuclear division is described by 2n n? Thought Questions 15. Skeletal muscle cells are multinucleated; each cell has multiple nuclei. Explain how a cell could end up with multiple nuclei. 16. During the life cycle of plants, haploid spores are produced. The spores germinate (divide) to form multicellular haploid gametophytes. What kind of nuclear division (mitosis or meiosis) do the gametophytes? Justify your answer spores undergo to form the 17. Meiosis I is being simulated with a pair of homologues that are red-long and yellow-long. w resulting daughter cell contain only red-long and the other daughter cell contain only vllhy will one occurred if each daughter cell contains a red and yellow-long? ain only yellow-long? WhatExplanation / Answer
Ans-1-During Mitosis, DNA is replicated during the S phase (Synthesis phase) of Interphase. condensation of chromosomes takes place in G2 phase after S phase.
2 ans-chromosomes break at centromere and sister chromatids pulled apart to opposite poles of the cell.
3 ans- during mitosis Mitochondria and ER will go under fission as well as Fusion.
Mitochondria capable of growing and dividing during the interphase.
4 ans-Aster formation is absent in plant cell and present in animal cell during mitosis.
5 ans-spindle fibre
6 ans- In Telophase Nuclear envelope reforms, forming a total of 4 haploid nuclei, chromosomes uncoil and spindle fibers disintegrate.
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