1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Afina-wow [57]
3 years ago
12

Compare and contrast Meiosis and Mitosis, how are they similar and how are they different?

Biology
1 answer:
Ugo [173]3 years ago
8 0

Answer:

Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.

You might be interested in
Which of the following is true of crossing over? It involves the exchange of chromosome segments between homologous chromosomes.
netineya [11]

Answer: All of the choices are correct.

Explanation:

<u>Meiosis is a type of cell division of the nucleus that occurs in cells that will give rise to gametes (egg or sperm).</u> These are haploid cells (n), that is, they possess only one chromosome of each of the pairs (23 in total). Through meiosis from a diploid cell (2n), four haploid cells are obtained, thanks to two successive divisions called meiosis I and meiosis II.  Both comprise prophase, metaphase,  anaphase and telophase.

Homologous chromosomes are a pair composed of a paternal and a maternal chromosome. They have the same DNA sequence arrangement from one end to the other, but different alleles. These chromosome copies have the same genes at the same loci where they contribute tips along each chromosome that facilitate a pair of chromosomes to align correctly with each other before they separate during meiosis. Sister chromatids are those that make up a chromosome after duplication of the genetic material.  

The homologous chromosomes of maternal and paternal origin, mate and this process is called "synapsis" and form what is known as a tetrad or bivalent chromosome, giving the impression that it is a chromosome with four chromatids. In these tetrads, junctions called chiasmata are formed, areas in which both homologues exchange genetic material or genes, a process known as crossing-over. The chiasmata allow the chromosomes to be held together until their separation in anaphase l. So, genetic recombination is the process by which a segment of genetic material from a maternal chromosome is cut and then joined to a paternal chromosome (or vice versa) during prophase I of meiosis. So it happens between non-sister chromatids of a paternal and a maternal chromosome.

<u>After crossing over, the homologous chromosomes are arranged randomly at the cell's  the equator of the cell at random (methaphase)</u>, facing each other, still united in the areas where crossing over occurred. Each chromosome is associated with a meiotic spindle fiber of the meiotic spindle and they are pulled along the meiotic spindle and driven toward the respective poles (anaphase). The chromosomes are now arranged at the poles and the reorganization of the nuclear envelope and the nucleolus begins. Finally, cytokinesis occurs and the rearrangement of cellular components and reorganization of the cytoskeleton. As a result of meiosis I,  2 haploid cells are obtained and then meiosis II occurs, where the sister chromatids are separated, generating two more cells (a total of 4).

Genetic variability is generated because the gametes produced during meiosis will not inherit the same chromosomes as the mother cell, but due to crossing over, the inherited chromosomes will be genetically different.

3 0
3 years ago
How do biologists describe the order of the stages of the<br> cell cycle?
ololo11 [35]
The cell stays in the interphase stage the longest. The interphase stage includes the G1 phase which is the initial growth of the cell. Next is the S phase and in simple terms it’s just the replication of the DNA. Next is the G2 phase which is the continued phase of cell growth. After interphase is completed, the cell enters prophase, then metaphase, then anaphase, then telophase, and finally cytokinesis.
7 0
3 years ago
Which of the following is an indicator of chemical change?
Gnom [1K]

Answer: a change in the temperature of the materials

Explanation:

5 0
3 years ago
Waste-to-energy plants convert trash into energy. The energy produced is known as ____?
Ymorist [56]

Answer:

Glucose

Explanation:

Because when the plants have waste or produce they will make glucose.

7 0
3 years ago
Why are bacteria necessary for life on Earth to exist?
SashulF [63]

Answer:

Bacteria are economically important as these microorganisms are used by humans for many purposes. The beneficial uses of bacteria include the production of traditional foods such as yogurt, cheese, and vinegar. Microbes are also important in agriculture for the compost and fertilizer production.

Explanation:

6 0
3 years ago
Other questions:
  • Peacock females often seek males that have the most alluring feathers display. Which challenges of life does the display of male
    15·1 answer
  • What have the elements of the copper family been used for
    9·2 answers
  • What are the narrow belts of fast-moving air at the higher levels of the troposphere called? A. doldrums B. sea breezes C. hurri
    10·2 answers
  • One of the roles of blood is to transport nutrients around the body and deliver molecules such as sugars and lipids to cells. A
    8·1 answer
  • Whats the weather in the usa today good or bad
    15·1 answer
  • Algae are green plants.
    15·1 answer
  • What are harmones ? why are they produced​
    12·2 answers
  • Explain how a population of insects could become resistant to a pesticide.
    9·2 answers
  • How are organisms classified? (circle all that apply)
    12·2 answers
  • With each ventricular systole, A) blood pressure remains steady. B) the ventricles fill with blood. C) blood pressure decreases.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!