Question

In: Biology

This is the properly explained question. You have to produce annotated drawings about the chromosome's behaviour...

This is the properly explained question. You have to produce annotated drawings about the chromosome's behaviour during cell division under meiosis justify the crossing over events and breaking of the centromeres event in Meiotic cell division.

Solutions

Expert Solution

When a cell divides into 2, a cell division takes place. There are 2 types of cell division - meiosis and mitosis.

Mitosis is called Equational division because the daughter cells derived from the parent cells are genetically identical to the parent cells. This type of division takes place during growth and repair of body cells. Moreover, a parent cell produces 2 daughter cells.

Meiosis is called Reductional Division because the number of chromosomes are reduced to half . This type of division takes place during gametes formation. One parent cell gives rise to 4 daughter cells.

In general , mitosis and meiosis consists of common stages called prophase, metaphase, anaphase and the telophase. Between the telophase of 1 cell division and the prophase of another division, a resting phase or interphase exists where a cell prepares for the next division..

Meiosis consists of 2 phases- meiosis 1 and meiosis 2.

Each of these phases consists of prophase, metaphase, anaphase and telophase.

First meiotic prophase in turn consists of 5 sub-phases called Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis.

Crossing over takes place during the Pachytene Stage of Meiosis 1. Crossing over is an exchange of chromatid segments between non-sister chromatids of each tetrad. The non-sister chromatids of a tetrad break at identical points. This breaking is favoured by the enzyme endonuclease. The broken segments of non-sister chromatids interchange, the enzyme ligase favours the event. The point of interchange and rejoining appears X-shaped and is called Chiasma.. as a result of crossing over, new combinations of hereditary materials are formed.


Related Solutions

What do you like about Annotated bibliographies?
What do you like about Annotated bibliographies?
In Brazil, the government is also concerned about the situation explained in question 1. But it...
In Brazil, the government is also concerned about the situation explained in question 1. But it has come to light that many coffee brands are wrongly marketed as fair trade by unscrupulous coffee companies, disguising the low wages paid to bean pickers. Such firms also contribute to groundwater pollution and deforestation by squeezing coffee farmers who need to cut production cost to make a living. Use the theories of market failure and government intervention to explain the reasons for this...
In Brazil, the government is also concerned about the situation explained in question 1. But it...
In Brazil, the government is also concerned about the situation explained in question 1. But it has come to light that many coffee brands are wrongly marketed as fair trade by unscrupulous coffee companies, disguising the low wages paid to bean pickers. Such firms also contribute to groundwater pollution and deforestation by squeezing coffee farmers who need to cut production cost to make a living. Use the theories of market failure and government intervention to explain the reasons for this...
In Brazil, the government is also concerned about the situation explained in question 1. But it...
In Brazil, the government is also concerned about the situation explained in question 1. But it has come to light that many coffee brands are wrongly marketed as fair tradeby unscrupulous coffee companies, disguising the low wages paid to bean pickers. Such firms also contribute to groundwater pollution and deforestation by squeezing coffee farmers who need to cut production cost to make a living. Use the theories of market failure and government intervention to explain the reasons for this concern....
1. How many sources are you required to write annotations about for your Annotated Bibliography? 2....
1. How many sources are you required to write annotations about for your Annotated Bibliography? 2. If you have more sources than the required amount for your Annotated Bibliography, then are you supposed to write more annotations and include them in your Annotated Bibliography? 3. How many academic peer reviewed sources are you required to include in your Annotated Bibliography? 4. In addition to the bibliographic information about your sources, what are the 3 different aspects you are required to...
Do you have experience writing annotations/ an annotated bibliography? If yes, explain. explain the purpose of...
Do you have experience writing annotations/ an annotated bibliography? If yes, explain. explain the purpose of the annotated bibliography assignment? To rephrase the question, how will it inform/assist you in the development of the research paper assignment. From your experience or opinion, what are some of the barriers students face when completing an annotated bibliography assignment? What resources are available to you or do you plan to employ to overcome any barriers you may face when completing this assignment?
“How can the Organizational Behaviour concepts and theories you have learnt in the course make you...
“How can the Organizational Behaviour concepts and theories you have learnt in the course make you more effective at school, home, work, and/or in other arenas of life? Use your personal and everyday examples to illustrate your reflections.” About 1000words
You have explained to Helen the importance of understanding how indirect costs can be allocated to...
You have explained to Helen the importance of understanding how indirect costs can be allocated to the cost of finished goods and the problems of using a cost of goods manufactured statement to apply these costs and appropriately cost and price her products. Divine Denim has 2 production departments (Cutting and Machining), and 3 support departments (Administration, IT and Design). The IT Department's costs are allocated based on the number of computers. The Administration Department's costs are allocated based on...
Choose one of analysis methods that explained in Chapter 13. You have to do the following:...
Choose one of analysis methods that explained in Chapter 13. You have to do the following: - Explain the analysis method. (what the method means? and what is used for?) - Apply the analysis method to one of a real company's numbers. (you can take the number from the internet) - Explain the results. (what the results means) Note, you will not use any method that used by other student before you. This assignment will be available from Saturday 11...
describes the ABC's (antecedents, behaviors and consequences) as explained in your textbook. (on what you have...
describes the ABC's (antecedents, behaviors and consequences) as explained in your textbook. (on what you have learned and what you think of A-B-C, how it relates to behavioral modification). by Pechakucha
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT