/*! 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 22 What does the apparent need for ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 5: Problem 22

What does the apparent need for dosage compensation mechanisms suggest about the expression of genetic information in normal diploid individuals?

Short Answer

Expert verified
Answer: Dosage compensation is crucial for the proper expression of genetic information, especially in diploid individuals, because it equalizes the expression of genes located on sex chromosomes between the different sexes. This ensures that both sexes have similarly regulated levels of key gene products, preventing imbalances in gene expression that could lead to harmful consequences in cell function and regulation. By maintaining the proper balance of genetic information, dosage compensation mechanisms contribute to the healthy development and functioning of diploid organisms.

Step by step solution

01

Understand the concept of dosage compensation

Dosage compensation is a mechanism that organisms use to equalize the expression of genes located on sex chromosomes (X and Y chromosomes in mammals) between the different sexes. In mammals, females have two X chromosomes (XX) while males have one X and one Y chromosome (XY). This means that there is a potential for females to have twice the amount of genetic material from the X chromosome compared to males. Dosage compensation mechanisms adjust gene expression levels so that the two sexes have similar levels of key gene products.
02

Recognize the potential issue in the absence of dosage compensation

If an organism lacks dosage compensation mechanisms, there might be substantial differences in gene expression levels between the sexes. This could lead to imbalances in the amounts of specific gene products, which could impact the development and functioning of the organism. For example, increased gene expression from the X chromosome in females might lead to harmful consequences for cell function or regulation that could create an imbalance in cellular processes.
03

Understand the implication for normal diploid individuals

The apparent need for dosage compensation mechanisms suggests that the expression of genetic information in normal diploid individuals needs to be tightly regulated. Without proper control, imbalances in gene expression levels can lead to potentially detrimental consequences in the development and function of the organism. Thus, dosage compensation mechanisms play a crucial role in ensuring the proper balance of genetic information between the sexes in diploid organisms.

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

In mice, the X-linked dominant mutation Testicular feminization (Tfm) eliminates the normal response to the testicular hormone testosterone during sexual differentiation. An XY mouse bearing the \(T f m\) allele on the \(X\) chromosome develops testes, but no further male differentiation occurs-the external genitalia of such an animal are female. From this information, what might you conclude about the role of the Tfm gene product and the X and \(Y\) chromosomes in sex determination and sexual differentiation in mammals? Can you devise an experiment, assuming you can "genetically engineer" the chromosomes of mice, to test and confirm your explanation?

Describe how nondisjunction in human female gametes can give rise to Klinefelter and Turner syndrome offspring following fertilization by a normal male gamete.

When cows have twin calves of unlike sex (fraternal twins), the female twin is usually sterile and has masculinized reproductive organs. This calf is referred to as a freemartin. In cows, twins may share a common placenta and thus fetal circulation. Predict why a freemartin develops.

Can the Lyon hypothesis be tested in a human female who is homozygous for one allele of the X-linked G6PD gene? Why, or why not?

Review the Chapter Concepts list on p. \(83 .\) These all center on sex determination or the expression of genes encoded on sex chromosomes. Write a short essay that discusses sex chromosomes as they contrast with autosomes.
See all solutions

Recommended explanations on Biology Textbooks

Energy Transfers

Read Explanation

Ecology

Read Explanation

Ecosystems

Read Explanation

Biology Experiments

Read Explanation

Cells

Read Explanation

Substance Exchange

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.