Answered: In rabbits, a locus involved in the…

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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7. In rabbits, a locus involved in the control of coat colour may be occupied by any of four
alleles: Full colour (C), Sepia (ck), Cream (cd), or Albino (ca). A geneticist counted the number
of Full colour (C), Sepia (ck), Cream (cd) and Albino coat offspring resulting after crosses
between Sepia (ck) and Cream (cd) coloured coated parents. The results were as follows.
• Full colour (C): 152
• Sepia (ck): 53
• Cream (cd): 39
• Albino (ca): 6
Mendelian inheritance of this trait predicts that the ratio of Full colour (C) to Sepia (ck) to Cream
(cd) to Albino (ca) should be 9:3:3:1. Do the experimental results support this mode of
inheritance?

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

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