MITOSIS AND MEIOSIS CROSSWORD PUZZLE If the answer consists of more than one word, write all words together. Skip no spaces. Use do hyphens 110 12 113 15 16 18 19 120 21 23 24 25
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MITOSIS AND MEIOSIS CROSSWORD PUZZLE If the answer consists of more than one word, write all words together. Skip no spaces.
ACROSS 1 cell division used for asexual reproduction by unicellular organisms 3 the pairing of homologous chromosomes during
The Correct Answer and Explanation is:
Let’s solve the MITOSIS AND MEIOSIS CROSSWORD PUZZLE by addressing ACROSS clues 1 and 3, as requested. If answers are multiple words, we will write them as one word without spaces or hyphens, as instructed.
ACROSS
1. Cell division used for asexual reproduction by unicellular organisms
Answer: Mitosis
Explanation:
Mitosis is the type of cell division that enables a unicellular organism to reproduce asexually. During mitosis, a single cell divides to produce two genetically identical daughter cells. This process is crucial for growth, repair, and maintenance in multicellular organisms and serves as a means of reproduction in unicellular organisms such as bacteria and amoebas.
The process of mitosis consists of several phases: prophase, metaphase, anaphase, and telophase, followed by cytokinesis. In prophase, chromosomes condense and become visible, and the nuclear envelope begins to break down. During metaphase, chromosomes line up along the metaphase plate. In anaphase, sister chromatids are pulled apart to opposite poles of the cell. Telophase marks the reformation of the nuclear envelope around the separated chromosomes, and cytokinesis splits the cytoplasm, completing cell division.
Because the daughter cells are clones of the parent cell, mitosis is ideal for asexual reproduction, where no genetic variation is introduced. This type of reproduction allows organisms to rapidly multiply in stable environments.
3. The pairing of homologous chromosomes during…
Answer: Synapsis
Explanation:
Synapsis is the process during prophase I of meiosis where homologous chromosomes (one from each parent) come together and align closely along their lengths. This alignment is critical for genetic recombination (crossing over), where segments of genetic material are exchanged between chromatids of homologous chromosomes. This results in genetic diversity in the gametes (sperm or egg cells).
Synapsis occurs exclusively during meiosis, not mitosis. The structure formed by the pairing of homologous chromosomes is called a tetrad, and it sets the stage for crossing over to occur at the chiasmata. The accurate pairing and recombination ensure genetic variation, which is essential for evolution and adaptation.
Without synapsis, meiosis cannot proceed correctly, and errors in chromosome number or structure (such as nondisjunction) could lead to disorders like Down syndrome. Hence, synapsis is a vital feature of sexual reproduction, ensuring offspring are genetically unique.
Summary of Answers:
- 1 Across: Mitosis
- 3 Across: Synapsis
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