Concept explainers
To write:
A plan indicating the way by which a flock of pure-breeding white sheep could be developed.
Introduction:
Each organism receives two version of the same gene, and these versions are termed as alleles. If different alleles are present in the gene, then the dominant allele will express itself and mask the effect of recessive allele. So, there are two types of alleles, dominant allele and recessive allele.
Explanation of Solution
Recessive allele can only be expressed in homozygous form (aa), but a dominant allele can be expressed in both homozygous (AA) and heterozygous (Aa) forms.
Here, white wool sheep is dominant over black wool sheep. Now in a flock, some sheep are heterozygous; this means these sheep will be white in color. So, establishing pure breeding lines will be a time consuming process as after some generations only pure breeding line can be obtained. For this, two white color sheep should be mated, if any of their child is black, then it means that white sheep are heterozygotes. Now, only white wool sheep should be mated for at least 3 generations. As after these generations, some homozygotes for white wool will be present, and they can carry on the pure breeding line.
Chapter 10 Solutions
Biology Illinois Edition (Glencoe Science)
Additional Science Textbook Solutions
Campbell Biology (11th Edition)
Concepts of Genetics (12th Edition)
Biological Science (6th Edition)
Study Guide for Campbell Biology
Microbiology: An Introduction (13th Edition)
Human Anatomy & Physiology (2nd Edition)
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education