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Chapter 12: Problem 7

True or False: Any genetic differences between daughter cells after mitosis are considered to be mutations.

Short Answer

Expert verified
True: Any genetic differences between daughter cells after mitosis are considered mutations.

Step by step solution

01

- Understand Mitosis

Mitosis is a type of cell division that results in two daughter cells, each having the same number and kind of chromosomes as the parent nucleus. Essentially, mitosis produces genetically identical daughter cells.
02

- Define Mutations

Mutations are changes in the DNA sequence that are not typical and can be caused by errors during DNA replication or from environmental factors such as radiation or chemicals.
03

- Determine Genetic Differences

Genetic differences between daughter cells after mitosis are typically not expected because mitosis should produce identical copies. However, if there are any genetic differences, they would be considered mutations since mutations are defined as changes in the DNA sequence.
04

- Conclude

Since any genetic differences in daughter cells after mitosis must result from errors in DNA replication (mutations), the statement that any genetic differences between daughter cells after mitosis are considered to be mutations is True.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Cell Division
Cell division is a fundamental biological process where a single cell divides to form two or more daughter cells. The primary purpose of cell division is growth, repair, and reproduction in organisms.
There are two main types of cell division:
  • Mitosis: This occurs in somatic cells and produces two genetically identical daughter cells.
  • Meiosis: This occurs in germ cells and results in four genetically diverse gametes, each with half the number of chromosomes of the original cell.
Mitosis involves several stages, such as prophase, metaphase, anaphase, and telophase, ensuring the accurate distribution of chromosomes to the daughter cells. On the other hand, meiosis includes two consecutive divisions, Meiosis I and Meiosis II, promoting genetic diversity.
Genetic Mutations
Genetic mutations are changes in the DNA sequence that can occur naturally or be induced by external factors like radiation or chemicals. Mutations can occur during DNA replication or as a result of environmental stress.
  • Point Mutations: Changes in a single nucleotide base.
  • Insertions/Deletions: Addition or loss of nucleotide bases, which can lead to a frameshift.
  • Chromosomal Alterations: Large-scale changes such as duplications, deletions, inversions, or translocations of chromosomal segments.
While some mutations can provide beneficial traits, others can lead to genetic disorders or malignancies. In context of mitosis, genetic differences between daughter cells usually indicate mutations, since normally, mitosis produces identical daughter cells.
DNA Replication
DNA replication is the process by which a cell duplicates its DNA before cell division, ensuring that each daughter cell receives an exact copy of the genetic material. This complex process involves several key steps and enzymes.
  • Initiation: DNA replication begins at specific locations called origins of replication.
  • Unwinding: The enzyme helicase unwinds the double-stranded DNA.
  • Elongation: DNA polymerase adds complementary nucleotides to the exposed DNA strand.
  • Termination: Replication ends when the entire DNA molecule has been copied.

    • Errors during DNA replication can lead to mutations. The high fidelity of replication is ensured by proofreading functions of DNA polymerases. Despite these mechanisms, mistakes occasionally occur, leading to genetic differences that are considered mutations.
    Understanding DNA replication helps clarify why any genetic difference between daughter cells after mitosis must result from replication errors.

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    Most popular questions from this chapter

    What is the difference between mitosis and cytokinesis?

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