In shorthorn cows, neither the red-haired gene (R) nor the white-haired gene (r) is dominant. A hybrid cow displays a roan color. A pure red cow and crossed with a pure white bull. What are the possible genotypes and phenotypes and their likelihood of appearance? Dam Genotype Sire % chance in offspring Phenotype % chance in offspring

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,...
icon
Related questions
Topic Video
Question
**Title: Genetics of Shorthorn Cattle: Understanding Roan Color Inheritance**

In Shorthorn cows, neither the red-haired gene (R) nor the white-haired gene (r) is dominant. A hybrid cow displays a roan color. This educational module explores the genetics behind this phenomenon using a Punnett square analysis.

### Genetic Cross Overview

- **Scenario**: A pure red cow is crossed with a pure white bull.
- **Objective**: Determine the possible genotypes and phenotypes of their offspring and the likelihood of each.

### Punnett Square

The central diagram is a Punnett square, which illustrates the genetic cross between the Dam (female) and the Sire (male). 

- **Rows (Dam's alleles)**: R (red-haired gene)
- **Columns (Sire's alleles)**: r (white-haired gene)

The cells within the Punnett square represent potential genotypes for the offspring.

### Results: Genotypes and Phenotypes

**1. Genotype Table:**

| **Genotype** | **% Chance in Offspring** |
|--------------|---------------------------|
| Rr           |                           |
| rr           |                           |

**2. Phenotype Table:**

| **Phenotype** | **% Chance in Offspring** |
|---------------|---------------------------|
| Roan          |                           |
| White         |                           |

### Conclusion

By understanding the basic principles of genetics displayed in this exercise, students can predict the inheritance of physical traits in cattle, specifically focusing on how the roan color emerges in Shorthorn cows through a blend of red and white-haired genes.
Transcribed Image Text:**Title: Genetics of Shorthorn Cattle: Understanding Roan Color Inheritance** In Shorthorn cows, neither the red-haired gene (R) nor the white-haired gene (r) is dominant. A hybrid cow displays a roan color. This educational module explores the genetics behind this phenomenon using a Punnett square analysis. ### Genetic Cross Overview - **Scenario**: A pure red cow is crossed with a pure white bull. - **Objective**: Determine the possible genotypes and phenotypes of their offspring and the likelihood of each. ### Punnett Square The central diagram is a Punnett square, which illustrates the genetic cross between the Dam (female) and the Sire (male). - **Rows (Dam's alleles)**: R (red-haired gene) - **Columns (Sire's alleles)**: r (white-haired gene) The cells within the Punnett square represent potential genotypes for the offspring. ### Results: Genotypes and Phenotypes **1. Genotype Table:** | **Genotype** | **% Chance in Offspring** | |--------------|---------------------------| | Rr | | | rr | | **2. Phenotype Table:** | **Phenotype** | **% Chance in Offspring** | |---------------|---------------------------| | Roan | | | White | | ### Conclusion By understanding the basic principles of genetics displayed in this exercise, students can predict the inheritance of physical traits in cattle, specifically focusing on how the roan color emerges in Shorthorn cows through a blend of red and white-haired genes.
Expert Solution
Step 1: Introduce about the alleles

Alleles are the alternative forms of a gene that are located on the same locus of a homologous chromosome with contrasting characteristics. In the case of Mendelian inheritance, a particular gene has two alleles, one is dominant and another is recessive in nature.

steps

Step by step

Solved in 3 steps with 1 images

Blurred answer
Knowledge Booster
Patterns of inheritance
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education