/*! 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 8 What two essential criteria must... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 5: Problem 8

What two essential criteria must be met in order to execute a successful mapping cross?

Short Answer

Expert verified
Answer: The two essential criteria for a successful mapping cross are: 1) the organisms being crossed must be pure-breeding or true-breeding for the traits being studied, and 2) the traits being studied must be linked, meaning they are inherited together more often than expected by chance due to their proximity on the same chromosome.

Step by step solution

01

1. Pure-breeding organisms

In a successful mapping cross, the organisms being crossed must be pure-breeding, or true-breeding, for the traits being studied. This means that these organisms consistently pass down their traits unchanged to their offspring, ensuring that the genes contributing to those traits are homozygous. This ensures clear and consistent inheritance patterns in F1 and F2 generations, which are crucial for making accurate predictions and conclusions about the inheritance of the traits being studied.
02

2. Linked traits

The second essential criterion for a successful mapping cross is that the traits being studied must be linked. This means they are located close to each other on the same chromosome, causing them to be inherited together more often than expected by chance as there is a lower probability of crossing over occurring between them during meiosis. As a result, the recombination frequency between linked traits is less than 50%. By analyzing the recombination frequency, the distance between the linked traits can be determined and the order of the genes on the chromosome can be mapped.

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

Review the Chapter Concepts list on page \(138 .\) Most of these center around the process of crossing over between linked genes. Write a short essay that discusses how crossing over can be detected and how the resultant data provide the basis of chromosome mapping.

The genes dumpy\((d p),\) clot \((c l),\) and apterous \((a p)\) are linked on chromosome II of Drosophila. In a series of two-point mapping crosses, the following genetic distances were determined. What is the sequence of the three genes?

Describe the cytological observation that suggests that crossing over occurs during the first meiotic prophase.

Why are double-crossover events expected less frequently than single-crossover events?

Why does more crossing over occur between two distantly linked genes than between two genes that are very close together on the same chromosome?
See all solutions

Recommended explanations on Biology Textbooks

Genetic Information

Read Explanation

Chemistry of Life

Read Explanation

Astrobiological Science

Read Explanation

Ecosystems

Read Explanation

Cells

Read Explanation

Ecological Levels

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.