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Umnica [9.8K]
2 years ago
7

Mitosis is a type of cell division that produces cells that are used for growth and repair. Meiosis is a different type of cell

division that produces sex cells used for sexual reproduction.
Based on the information provided, which of the following is a difference between mitosis and meiosis?
A.
Mitosis produces cells that carry half of the genetic material of the parent cell, while meiosis produces cells that are identical to the parent cell.
B.
Mitosis produces cells that are identical to the parent cell, while meiosis produces cells that carry twice as much genetic material as the parent cell.
C.
Mitosis produces cells that carry twice as much genetic material as the parent cell, while meiosis produces cells that identical to the parent cell.
D.
Mitosis produces cells that are identical to the parent cell, while meiosis produces cells that carry half of the genetic material of the parent cell.
Biology
1 answer:
Nataly [62]2 years ago
3 0
The correct answer is B.
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Which of the following best describes how a blood cell and skin cell have the exact same DNA sequence and yet look different and
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This question is incomplete as it lacks options, however, it will be answered BROADLY so the it can be understood enough to select the correct answer.

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Explanation:

Cells perform different functions and look differently because of the process of CELL DIFFERENTIATION. All cells arise from a single stem cell, which then gradually differentiates into different types of cells with different functions, as they divide.

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Therefore, a blood cell and skin cell possess exactly the same DNA sequence but look different and perform different functions because of CELL DIFFERENTIATION in which some genes on the DNA sequence are expressed and others are repressed. For example, in the blood cell; the genes coding for certain proteins found in blood are expressed while every other gene is silenced or inhibited. This allows those cells to perform only blood-related functions.

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3 years ago
Answers amoeba sisters: video recap meiosis
Schach [20]

1. Interphase is an important and the longest phase of the cell cycle during which the cell prepares for division by coping its DNA. It is metabolic phase of the cell, in which the cell grows, obtains nutrients and metabolizes them. There are three stages of interphase: G1 (the cell growth), S (replication of DNA, chromosomes are copied) and G2 (preparation for division). Without this phase, genetic material wouldn’t be ready for the process of meiosis  and haploid gametes couldn’t be created.

2. Homologous chromosomes are the similar but not totally identical chromosome pairs that an organism receives from its two parents. During the prophase I of meiosis they pair up: each chromosome aligns with its homologue partner via link-chiasmata ( the two match up at corresponding positions). Those homologue pairs separate during a first stage of cell division (meiosis I-reduction of chromosomes number, from diploid to haploid), while sister chromatids separate during a second stage (meiosis II).

3. Crossing over is a process in which homologous chromosomes trade their parts. Crossing over is process of genetic recombination where DNA is cut and then repaired. Cut and repair of homologous chromosomes allow them to exchange some of their genetic information. As a consequence of crossing over, new arrangement of maternal and paternal alleles on the same chromosome is achieved. It is the way to create varations.

4. During the metaphase I, homologue pairs are lined up comparing to metaphase II where individual chromosomes are lined up. It is because during the meiosis I homologue pairs separate and chromosome number reduce from diploid to haploid. On the other hand, during the meiosis II, sister chromatids separate.

5. Nondisjunction is the consequence of cell division, where there is no properly separation. There are  different forms of nondisjunction:  

• failure of a pair of homologous chromosomes to separate in meiosis I,  

• failure of sister chromatids to separate during meiosis II.

After nondisjunction, resulting daughter cells are with abnormal chromosome numbers -aneuploidy.


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