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Description: The genotypic ratio is 1 FF: 2 Ff: 1 ff, or simply 1:2:1, butthe phenotypic ratio is 3:1. Why?

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The genotypic ratio is 1 FF: 2 Ff: 1 ff, or simply 1:2:1, butthe phenotypic ratio is 3:1. Why?

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 8SQ

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Concept explainers

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.

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Question

The genotypic ratio is 1 FF: 2 Ff: 1 ff, or simply 1:2:1, but
the phenotypic ratio is 3:1. Why?

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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