/*! 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 21 How many sister chromatids are s... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Problem 21

How many sister chromatids are seen in the metaphase for a single chromosome? How different are these structures from the interphase chromatin?

Short Answer

Expert verified
Answer: In a single chromosome during metaphase, there are two sister chromatids. The main difference between metaphase chromosome structure and interphase chromatin is the level of chromatin condensation and organization; metaphase chromosomes are highly condensed and organized for proper segregation during cell division, while interphase chromatin is loosely coiled and dispersed, allowing gene transcription to occur.

Step by step solution

01

1. Understanding sister chromatids and metaphase

During mitosis, the process of cell division, chromosomes are first duplicated and then separated into two identical sets, ensuring the daughter cells receive the correct number of chromosomes. At the beginning of mitosis, each chromosome is made of two identical structures called sister chromatids, held together at a region known as the centromere. During metaphase, one of the stages of mitosis, the sister chromatids line up at the equator of the cell, preparing for separation in the next stage, anaphase.
02

2. Determining the number of sister chromatids in metaphase for a single chromosome

In metaphase, a single chromosome consists of two identical sister chromatids. So, for a single chromosome in metaphase, there are two sister chromatids.
03

3. Understanding interphase chromatin

Interphase is the stage of the cell cycle when the cell is not actively dividing but is preparing for division by replicating its DNA and other cellular components. This is when the genetic material is in the form of loosely coiled chromatin. The chromatin consists of DNA and its associated proteins, mainly histones.
04

4. Comparing metaphase chromosome structure to interphase chromatin

During interphase, the chromosomes are uncondensed and in the form of dispersed chromatin, which allows for the transcription of genes to produce RNA and proteins as needed by the cell. In contrast, during metaphase, the chromosomes become highly condensed and organized, with the chromatin tightly coiled around the histone proteins. This compact structure is necessary for the chromosomes to be easily segregated during cell division, ensuring each daughter cell receives an identical set of chromosomes. The main difference between these structures is the level of chromatin condensation and organization, which varies depending on the specific stage of the cell cycle.

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 91影视!

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

What is the significance of checkpoints in the cell cycle?

Define and discuss these terms: (a) synapsis, (b) bivalents, (c) chiasmata, (d) crossing over, (e) chromomeres, (f) sister chromatids, (g) tetrads, (h) dyads, (i) monads.

Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I of meiosis. How might the genetic content of these change by the time tetrads have aligned at the equatorial plate during metaphase I?

Cell division cycle mutations render the mutants unable to continue the cell cycle. This phenotype creates a paradox where mutant cells must also be grown in the lab to further identify the gene and study the role of the protein. How do you think this problem can be solved?

Why might different cells of the same organism have cell cycles of different durations?
See all solutions

Recommended explanations on Biology Textbooks

Biological Structures

Read Explanation

Organ Systems

Read Explanation

Substance Exchange

Read Explanation

Reproduction

Read Explanation

Cell Communication

Read Explanation

Chemistry of Life

Read Explanation
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.