ATGCGTACG TACGCATGC 44. Using the molecule of DNA shown in the previous question

Question

ATGCGTACG TACGCATGC 44. Using the molecule of DNA shown in the previous question, show a mutation. 45. Why are mutation problematic for the cell? 46. What is the name of the process that splits the cell body in two? 47. What is the name of the process that divides the cell nucleus in two? 48. Explain why the following statement is not correct Mitosis produces genetic diversity 49. In what phase of mitosis does the cell have 2 nuclei? 50. In what phase of the cell cycle do the sister chromatids separate?

Explanation / Answer

45. ATGCGTACG changes to ATGCGTGCG

TACGCATGC changes to TACGCACGC

change in 7th amino acid of Dna sequence leads to mutation in the sequence or deletion in any amino acid or insertion of amino acid will lead to mutation. ..

45. mutation is caused due to spontaneous changes in the genetic code so if there is any change in the DNA sequence it can lead to disease which could be either due to inherited from the parents or could be due to damage in DNA due to environmental factors,, radiation.. one such disease is cancer which is caused due to multiple series of mutation within a single cell.. mutation can be usually due to defect in p53 gene which is involved in cell cycle regulation.

46. cell division is the process by which cell divides into two daughter cell.

47. mitosis is the process by which cell nucleus divide into two to produce two daughter cell in which each new cell gets a new set of chromosome from its parent.

48. mitosis do not produce genetic diversity because there is no crossing over between the chromosome of parent cell due to which new varieties of chromosome could not produce and no recombinant daughter cell generate during mitosis. ... mitosis leads to two new identical daughter cell.

49. during telophase stage, cell have 2 nuclei with each set of chromosomes and nucleoli and nuclear membrane reappears during this stage.

50. during anaphase stage of mitosis, sister chromatids seperate and move to opposite pole of the cell.

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