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Multiple Choice
Which of the following best describes the primary purpose of mitosis in multicellular organisms?
A
To produce genetically identical daughter cells for growth and tissue repair
B
To synthesize ATP for cellular energy
C
To increase genetic variation through crossing over
D
To generate gametes with half the number of chromosomes
Verified step by step guidance
1
Understand the purpose of mitosis: Mitosis is a type of cell division that occurs in somatic (non-reproductive) cells of multicellular organisms. Its primary role is to produce two genetically identical daughter cells from a single parent cell.
Eliminate incorrect options: The synthesis of ATP for cellular energy is not directly related to mitosis; ATP production occurs primarily in the mitochondria through cellular respiration. Therefore, this option is incorrect.
Consider genetic variation: Mitosis does not involve crossing over or increasing genetic variation. Crossing over occurs during meiosis, which is a different type of cell division responsible for producing gametes (sperm and egg cells). Thus, this option is also incorrect.
Evaluate gamete production: Mitosis does not generate gametes with half the number of chromosomes. This is the role of meiosis, which reduces the chromosome number by half to ensure proper chromosome number in offspring. Therefore, this option is incorrect.
Conclude the correct answer: The primary purpose of mitosis in multicellular organisms is to produce genetically identical daughter cells. This process is essential for growth, tissue repair, and maintaining genetic consistency across cells.