What are some reasons why a single trait might notshow a 3 : 1 ratio of phenotypes in the F2 generation of across between true-breeding strains, and why a pair oftraits might not show a 9 : 3 : 3 : 1 ratio of phenotypes in theF2 generation of a cross between true-breeding strains?

What are some reasons why a single trait might notshow a 3 : 1 ratio of phenotypes in the F2 generation of across between true-breeding strains, and why a pair oftraits might not show a 9 : 3 : 3 : 1 ratio of phenotypes in theF2 generation of a cross between true-breeding strains?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter5: The Inheritance Of Complex Traits

Section: Chapter Questions

Problem 16QP: Why are monozygotic twins who are reared apart so useful in the calculation of heritability?

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Concept explainers

Genome annotation

The technique of linking biological information to genome sequences is termed genome annotation. Gene annotation is the method of identifying gene locations and coding sections. It helps us understand what these genes are doing in the body through establishing structural characteristics and linking them to the actions of various proteins.

Question

What are some reasons why a single trait might not
show a 3 : 1 ratio of phenotypes in the F2 generation of a
cross between true-breeding strains, and why a pair of
traits might not show a 9 : 3 : 3 : 1 ratio of phenotypes in the
F2 generation of a cross between true-breeding strains?

Definition Definition Observable physical traits or characteristics of an organism, which are determined by its genetic makeup (genotype) as well as environmental factors. These traits can include anything from eye color or height to behavior or disease susceptibility. Understanding an organism's phenotype is important in fields such as genetics, medicine, and ecology.

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Why are monozygotic twins who are reared apart so useful in the calculation of heritability?
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