INSTRUCTIONS: Now that you\'ve studied mitosis and meiosis, answer the questions

Question

INSTRUCTIONS: Now that you've studied mitosis and meiosis, answer the questions about H CELLS below to reinforce your understanding of the differences between these two forms of cell replication 1. Fill-in the Table QUESTION MITOSIS MEIOSIS In what type of cell does each form of cell replication occur? What are the purposes of each form of cell replication? How many times does DNA replicate? How many chromosomes are in the parent cell? How many cell divisions occur? How many daughter cells are formed from 1 parent cell? How many chromosomes are in each daughter cell? Are daughter cells genetically identical to or different from parent cells? Does crossing over' occur? If so, when and why? Sexual or asexual reproduction?

Explanation / Answer

In order from top to bottom Mitosis Meiosis Usually restricted to diploid cells. But also occurs in haploid cells of lower plants and social insects. Occurs in diploid cells. Helps to maintain nucleo-cytoplasmic ratio and helps in cell repair. Helps to maintain chromosome number across generations and increases genetic variability. DNA replication occurs once. Once. Parent cell has 46 chromosomes. Parent cell has 46 chromosomes. One cell division occurs. Two cell divisions occurs. From one parent cell two daughter cells are formed. Four daughter cells are formed. Each daughter cell has same chromosome as parents cell, i.e., 46. Each daughter cell has Half the number of chromosome as parent, i.e., 23. Daughter cells are genetically identical to parents. Daughter cells are genetically different from parents. No crossing over. Crossing over occurs during Prophase-I of meiosis-I. Basically asexual reproduction. During sexual reproduction

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