Which of the two processes, mitosis or meiosis, has greater significance in genetic studies and why?
Solutions
Expert Solution
Mitosis vs Meiosis:
Both of these processes i.e., mitosis and meiosis are important in genetic studies, but they have different significance and applications.
The Mitosis is a type of cell division that occurs in the somatic cells i.e., non-reproductive cells to produce 2 identical daughter cells with the same number of chromosomes as the parent cell.
In the multicellular organisms, this process is involved in growth, development and tissue repair.
In genetic studies, mitosis is essential for studying somatic cells, which contain the full complement of chromosomes and are responsible for transmitting genetic information from one generation of cells to the next generation within an individual.
The somatic cells make up the majority of an organism's body.
Moreover, when it comes to the genetic diversity and the inheritance of traits, meiosis plays a more significant role.
The Meiosis is a specialized type of cell division process that occurs in the reproductive cells i.e., gametes to produce haploid cells i.e.,sperm and eggs with half the number of chromosomes.
This meiosis involves 2 rounds of division which results in 4 non-identical daughter cells with unique combinations of genetic material.
This process introduces the genetic variation through processes like crossing over and independent assortment, which shuffle and recombine the genetic material from the parents.
This genetic diversity is essential for the evolution, adaptation and the production of offspring with unique combinations of traits or characters.
This process is particularly important in genetic studies because it is responsible for the inheritance of genetic information across generations i.e., from generation to generation.
By studying this process, researchers can investigate how the genetic traits are passed from parents to offspring, can understand the patterns of inheritance, and can study the genetic disorders and mutations.
This process also plays a crucial role in the reproductive technologies like in vitro fertilization and genetic engineering techniques such as gene editing because it enables the manipulation of genetic material and the creation of genetically modified organisms.
As a whole, from this discussion we consider that mitosis is vital for cell growth and maintenance but meiosis has greater significance in genetic studies due to its role in generating genetic diversity, inheritance patterns and reproductive technologies.
Mitosis vs Meiosis
Mitosis:
It is a type of cell division which occurs in the somatic cells i.e., non-reproductive cells to produce 2 identical daughter cells with the same number of chromosomes as that of the parent cell.
In multicellular organisms, it is involved in growth, development and tissue repair.
Meiosis:
It is a specialized type of cell division which occurs in the reproductive cells i.e., gametes to produce 4 non-identical daughter cells, each with half the number of chromosomes as that of the parent cell.
This process is responsible for the formation of eggs and sperm, by introducing genetic diversity through the processes like crossing over and independent assortment.
It is essential for the sexual reproduction and the inheritance of traits or characters across the generations.
Describe similarities and/or differences between the phases and
outcomes of mitosis and meiosis.
a. Mitosis vs. meiosis
b.Chromosome number in all stages
Exercise 3: Comparing and Contrast Mitosis to
Meiosis
Complete Table 1 below.
Table 1: Mitosis vs Meiosis
Mitosis
Meiosis
Parent cell diploid or haploid
Number of daughter cells
2
4
Daughter cells diploid or haploid
Are homologous chromosomes paired?
Does synapsis form?
no
Synapsis form
Does a daughter cell have the same, ¾ , ½ , or ¼ the amount
of DNA as the parent cell?
Type of cell produced (somatic or gamete)
1. Determine if the following stages have...
Meiosis ______ while mitosis _____Fill in the blanks with the answer choices to correctly complete
the sentenceExchange genetic information through crossing-over during
prophase II ; never exchanges genetic information through
crossing-overGoes through DNA replication twice ; goes through DNA
replication onceProduces 4 identical daughtur cells ; produces 2 identical
daughter cellsWill have tetrads at the metaphase plate during metaphase 1 ;
Will have dyads at the metaphase plate during metaphaseNone of the above
Comparing nuclear and chromosomal activities in mitosis and
meiosis
Mitosis
Meiosis
Synapsis
Crossing over
When centromeres separate
Chromosome structure and movement during
anaphase
Number of divisions
Number of chromosomes in daughter cells
Genetic similarity of daughter cells to parent
cells
Which of the following statements about meiosis and/or mitosis
is incorrect?
a. Mitosis results in 2 diploid daughter cells
b. Meiosis in humans only occurs in gonad cells
c. Homologous chromosomes line up along the metaphase plate
during mitosis
d. Crossover occurs during prophase I of meiosis.
a) explain the steps in mitosis
b) what are the key differences between meiosis and mitosis
c) If the protein actin was inhibited during cell division, what
could be the impact?