/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 38 Describe the sequence of mitotic... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Describe the sequence of mitotic cell cycle for one pair of chromosome that is undergoing normal mitotic division. a. anaphase - metaphase - prophase - cytokinesis b. anaphase - prophase - metaphase - cytokinesis c. prophase - anaphase - metaphase - cytokinesis d. prophase - metaphase - anaphase - cytokinesis

Short Answer

Expert verified
The correct sequence is prophase - metaphase - anaphase - cytokinesis.

Step by step solution

01

Identify the Correct Sequence

Identify the correct order of the phases in a normal mitotic cell cycle for one pair of chromosomes. The options provided are anaphase - metaphase - prophase - cytokinesis, anaphase - prophase - metaphase - cytokinesis, prophase - anaphase - metaphase - cytokinesis, and prophase - metaphase - anaphase - cytokinesis. Recall that the order for mitosis is prophase, metaphase, anaphase, and telophase, and finally cytokinesis.
02

Begin with Prophase

Prophase is the first phase of mitosis. During prophase, the chromosomes condense, the nuclear membrane dissolves, and the mitotic spindle begins to form.
03

Metaphase Comes After Prophase

During metaphase, the chromosomes align in the center of the cell, along the metaphase plate. The spindle fibers attach to the centromeres of the chromosomes.
04

Anaphase Follows Metaphase

In anaphase, the sister chromatids are pulled apart by the spindle fibers and move towards opposite poles of the cell.
05

Cytokinesis as the Final Step

Cytokinesis is the process that follows telophase, where the cytoplasm of the cell divides to form two daughter cells. This step occurs at the end of mitosis.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Prophase
Prophase is the first phase of the mitotic cell cycle. During this stage, several key events occur to prepare the cell for division. The chromosomes, which have already been duplicated, condense and become visible under a microscope. This condensation is crucial as it makes the chromosomes easier to separate later on. The nuclear membrane, which encloses the nucleus, starts to dissolve, allowing the spindle fibers to access the chromosomes. The mitotic spindle, a structure made of microtubules, begins to form. Its primary function is to help segregate the chromosomes. Understand that prophase sets the stage for the processes that follow, ensuring that everything is in place for the subsequent steps of mitosis.
Metaphase
Once the cell has completed prophase, it moves on to metaphase. During metaphase, the chromosomes align themselves in the center of the cell, forming what is known as the metaphase plate. This alignment is critical for ensuring that each new cell will receive an identical set of chromosomes. The spindle fibers extend from the poles of the cell to the centromeres of the chromosomes, attaching firmly. This setup ensures that when the chromosomes are pulled apart, they will be evenly distributed between the two daughter cells. The meticulous organization of metaphase is vital for the accurate division of genetic material.
Anaphase
Anaphase is the stage where the magic of chromosome separation occurs. During this phase, the centromeres split, and the sister chromatids are pulled apart by the spindle fibers. They move towards opposite poles of the cell. This separation ensures that each daughter cell will have an identical set of chromosomes. The movement is fast and precise, ensuring minimal errors in genetic distribution. The spindle fibers shorten, pulling the chromatids apart with the help of motor proteins. Anaphase ensures that the genetic material is split correctly, making it ready for the final stages of cell division.
Cytokinesis
Cytokinesis is the final step in the mitotic cell cycle. It starts towards the end of telophase and completes the process of cell division. During cytokinesis, the cytoplasm of the single parent cell divides into two daughter cells. In animal cells, this is accomplished through a process called cleavage, where a contractile ring forms and pinches the cell into two. In plant cells, a cell plate forms in the center of the cell and gradually develops into a separating wall. By the end of cytokinesis, two distinct daughter cells are formed, each with its own nucleus and complete set of chromosomes. Cytokinesis ensures the physical separation of the cytoplasm, completing the cycle of cell division and leading to the formation of two genetically identical daughter cells.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Explain how DNA, which in humans measures approximately two meters, can fit inside a human cell that is about 10 µm . Discuss how the organization of the genetic material in eukaryotes differs from prokaryotes. a. The DNA is found wrapped around histones to form nucleosomes, which further compact and ultimately form linear chromosomes. The prokaryotic genome is found as a loop and in eukaryotes as a double-stranded linear structure. b. The DNA is wrapped around the nucleosomes to show a compact structure. The eukaryotes show a loop structure and prokaryotes show a doublestranded linear genome. c. The genetic material shows ringed heterochromatin structure. The prokaryotes show multiple loops, and eukaryotes show a condensed chromatin. d. The genetic material is wrapped around histones. The prokaryotes have a condensed structure in nucleoids, but eukaryotes have double-stranded linear structure.

What would be the outcome of blocking S-phase of interphase? a. The cell would enter karyokinesis. b. DNA replication would not occur. c. Centrosomes would be duplicated. d. The cytoskeleton would be dismantled.

Eukaryotic chromosomes are thousands of times longer than a typical cell. Explain how chromosomes can fit inside a eukaryotic nucleus. a. The genetic material remains distributed in the nucleus, mitochondria, and chloroplast. b. The genome is present in a looped structure, thus it fits the size of the nucleus. c. The DNA remains coiled around proteins to form nucleosomes. d. The genetic material remains bound to the nuclear envelope, forming invaginations.

Attachment of the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis? a. anaphase b. prophase c. prometaphase d. metaphase

Chemotherapy drugs such as vincristine and colchicines disrupt mitosis by binding to tubulin (the subunit of microtubules) and interfering with microtubule assembly and disassembly. Exactly what mitotic structure do these drugs target, and what effect would that have on cell division? a. The drugs bind tubulin and inhibit the binding of spindle to the chromosome. This can arrest the cell cycle. b. The drugs bind the tubulin, which leads to an error in the chromosome separation. This could lead to apoptosis. c. The drugs bind the tubulin, thereby inhibiting their division in S-phase. This inhibits cell division. d. The drugs bind the spindle fiber and hinder the separation of chromatins. This promotes the division spontaneously.

See all solutions

Recommended explanations on Biology Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.