A- the two nematode populations have undergone complete speciationB- individuals reared on different bacteria produce offspring that have a better chance of survivalC- The populations appear to be most likely in the process of speciationD- all individuals were equally reproductively successful regardless of mate combination Ack! Your nematode cultures are infested with a pesky, but novel bacterium! You decide to grow nematodes on either normal bacteria or the new novel bacteria. After 10 generations, you attempt mating trials between the two populations. Below are the results of your breeding experiments. The numbers within each box represent the number of offspring produced in the cross.**Chart Explanation:**The chart displays the results of crossbreeding experiments between nematodes that were reared on normal versus novel bacteria. The rows represent the source of male nematodes, and the columns represent the source of female nematodes. - **Male nematodes reared on normal bacteria:** - Female reared on normal bacteria: 290 offspring - Female reared on novel bacteria: 153 offspring- **Male nematodes reared on novel bacteria:** - Female reared on normal bacteria: 149 offspring - Female reared on novel bacteria: 312 offspring**Conclusion:**Which of the following is the most appropriate conclusion from your results?

Answered: Ack! Your nematode cultures are…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

A- the two nematode populations have undergone complete speciation B- individuals reared on different bacteria produce offspring that have a better chance of survival C- The populations appear to be most likely in the process of speciation D- all individuals were equally reproductively successful regardless of mate combination

Ack! Your nematode cultures are infested with a pesky, but novel bacterium! You decide to grow nematodes on either normal bacteria or the new novel bacteria. After 10 generations, you attempt mating trials between the two populations. Below are the results of your breeding experiments. The numbers within each box represent the number of offspring produced in the cross.

**Chart Explanation:**
The chart displays the results of crossbreeding experiments between nematodes that were reared on normal versus novel bacteria. The rows represent the source of male nematodes, and the columns represent the source of female nematodes.

- **Male nematodes reared on normal bacteria:**
- Female reared on normal bacteria: 290 offspring
- Female reared on novel bacteria: 153 offspring

- **Male nematodes reared on novel bacteria:**
- Female reared on normal bacteria: 149 offspring
- Female reared on novel bacteria: 312 offspring

**Conclusion:**
Which of the following is the most appropriate conclusion from your results?

Expert Solution

Step 1 Introduction

Speciation is a multiplication process in which one genetically related population splits into two populations between which no genetic interchange occurs. When two populations that have been separated for a long time reunite, their reproductive isolation may be complete or incomplete. If it is complete, that means speciation has occurred, whereas hybrids would be produced if it is incomplete. If the hybrids were less competent than either of the parental forms, selection would increase reproductive isolation because neither form would want to mate with the other, resulting in undesirable hybrids. By selecting genes that caused individuals to avoid mating with hybrids, speciation may be accelerated.