1) Which of the following is true of the meiosis cell cycle, but NOT the mitosis
ID: 258464 • Letter: 1
Question
1) Which of the following is true of the meiosis cell cycle, but NOT the mitosis cell cycle?
The DNA is replicated twice.
Homologous chromosomes undergo recombination.
Sister chromatids separate.
None of the above
2) Which of the following is true of the mitosis cell cycle, but NOT the meiosis cell cycle?
The DNA is replicated once.
Sister chromatids separate.
Daughter cells are genetically identical to the parent cell.
None of the above
3) Fill in each blank using one of the following terms: diploid, haploid, egg, sperm, meiosis I, meiosis II
PLEASE NOTE: Each answer choice must be used exactly ONCE. Answers are not case sensitive, but they must be typed in exactly as written above. Roman numerals after the words meiosis must be the letter i.
Segregation of homologous chromosomes occurs during---------------- , while separation of sister chromatids occurs during----------------- . Primary oocytes and primary spermatocytes are------------------------- cells. Meiosis produces four ------------------------ cells or one ------------------------ cell. The cells that result from meiosis are -------------------------- cells.
4) True or false: The X and Y chromosome recombine with each other during meiosis of sperm precursors.
True
False
Explanation / Answer
1) In meiosis homologous recombination occurs during the crossing over during zygotene syage of prophase 1. Whereas no recombination occurs in mitosis though both replicate only once. 2) In mitosis daughter cells are genetically identical to parent cells as no recombination or crossing over is taking place. Only cell division. 3) order is- meiosis 1, meiosis 2, diploid, sperms, egg, haploid. Meiosis 2 is just like mitosis ie cell division. So the sister chromatids separate. Due to reductional division diploid gametes will firm haploid 4 sperms and 1 egg. 4) true. Recombination occurs at the pseudoautosomal regions which is necessary as an ignition for meiosis in spermatocytes, failure to which meiosis will not occur or will remain incomplete.
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