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Fittoniya [83]
4 years ago
11

"Mitosis and Meiosis I are very different, but Mitosis and Meiosis II are very similar. Therefore, Meiosis I must cause all the

key differences between gametes and normal body cells." Do you agree or disagree with this statement?
Biology
2 answers:
Arada [10]4 years ago
7 0

Answer:

<h2>Agree </h2>

Explanation:

1. Through mitosis, Parental cell divide into two daughter cells with same number of chromosomes.

While meiosis produce 4 daughter cell from a single cell  with half the number of chromosomes as compared to parental cell.

2.Meiosis have two cycles , i) meiosis I and ii) meiosis II.

3. In meiosis I, chromosomes first go replication and become double, then cell  inter into meiosis I then into meiosis II and finally  produce four haploid daughter cells. It is the first step (meiosis I) that generates genetic diversity. During prophase I of meiosis I (meiosis)  homologous chromosomes pair and form synapses, a special step of meiosis, which is the main reason of causing diversity.

4. There is crossing over which produce genetic diversity between gametes.

ANEK [815]4 years ago
6 0
<h2>Mitosis and Meiosis I </h2>

Explanation:

Mitosis

  • Mitosis is one round replication and one round division, here genetic recombination is absent hence daughter cells are identical to parental cell
  • It includes two divisions: karyokinesis and cytokinesis
  • Karyokinesis includes separation of sister chromatids from a replicated chromosome and includes four sequential sub-phases: prophase,metaphase,anaphase,telophase
  • Prophase includes three major events: compaction of chromosome,assembly of mitotic spindle apparatus and disappearance of nuclear envelope
  • Metaphase occurs when all chromosomes are arranged at metaphase plate
  • Anaphase includes two major events: separation of two sister chromatids and movement of sister chromatids towards their respective poles
  • Telophase includes aggregation of two sets of chromosomes near the respective poles
  • Telophase is followed by cytokinesis where cytoplasm is divided into two which results in the generation of two daughter cells

Meiosis I

  • Meiosis I is the long phase where number of chromosomes is reduced and just becomes half
  • Separation of homologous chromosomes occur
  • Genetic recombination also occurs in meiosis I
  • Also completed in four sequential phases: prophase I, metaphase I, anaphase I, telophase I

Meiosis II

  • Meiosis II is similar to mitosis
  • Also includes 4 phases: prophase II,metaphase II, anaphase II, telophase II
  • Separation of sister chromatids occur in Anaphase II

Meiosis II is similar to mitosis because it separates the chromosomes to have sister chromatids in each cell

In both these process, chromosome are separated and cell divides to make two cells out of one

The key difference is that in meiosis,two cells are divided to get four cells

Meiosis I helps to get genetically unique chromosomes,crossing over occurs and at the end of division one parent cell produces two daughter cells each carrying one set of sister chromatids whereas mitosis is used to make body cells occurring in body

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Answer:

1. 25%

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6 0
3 years ago
Help with in-text citations. Answer soon, please! Paper due tomorrow.
Natali5045456 [20]
In-text citations are for any information you got from another source. if you directly quote it, you need an in-text citation; if you summarize it, you need one; if you paraphrase it, you need one.

APA format in-text citations require three things if available: the author's name, the year, and the page number. for parenthetical citations, it's formatted like so: (Smith, 2002, pp. 91)

however, signal phrases change things. signal phrases are your lead-ins to quotes, like, "According to John Smith" or "An article by Jane Doe" -- HOWEVER, in APA format, you're required to put the year in the signal phrase if you mention the author. "According to John Smith" becomes "According to John Smith (2002)," and you continue your sentence like normal.

if no author is available, cite it by the title of the web article. for example: ("Camping," 2001). if no page number is available, as is usually the case with web sources, leave it out.

remember that if you say the article/page number/author's name IN your signal phrase, the same information doesn't need to be repeated in your in-text citation. you only need to give the information once, because they'll be able to find it on your reference page:

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no "pp." is needed as they require in APA format. just the name, then a number for the page. that's it. if you say the author's name in your signal phrase, you only need to give the page number:

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this...is long. but i hope it helps! feel free to message me if you run across any special cases that give you trouble.
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3 years ago
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Marysya12 [62]
The answers are shown below:
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