Biological Science (6th Edition)
Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 14, Problem 17TYPSS
Summary Introduction

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The additional cross that might help in determining whether the Mendel’s model is valid for genes of horse and provide an explanation for the experimental cross performed along with the phenotypic frequencies that might be obtained from it. Further, explain the rationale behind the why the proposed cross model will provide the test of the model proposed by Mendel with respect to blending-inheritance.

Introduction:

According to the blending inheritance theory, the progeny of the parents produce offspring with the average characteristic of the parents. However, in contrast to this, Mendel proposed the particulate hypothesis of inheritance, on the basis of which the traits are inherited in discrete form. According to Mendel theory, the genetic integrity of the parents is always maintained. A particular researcher did not believe the hypothesis proposed by Mendel as when he crosses a chestnut horse (reddish-brown) with a cremello (very light-colored) horse, he always obtained an intermediate color horse, palmino (golden-yellow).

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Gregor Johann Mendel carried out experiments with pea plants that demonstrated how certain physical traits were passed down from one generation to the next in a predictable pattern. He introduced the concepts of dominant and recessive traits and established fundamental laws of inheritance for what is known as Mendelian Genetics. A trait can be inherited when each parent passes down one copy of a gene. Different versions of the same gene are known as alleles. Both gene copies are an organism’s genotype, and the physical expression of those genes is a phenotype. 1. Explain one of the three laws of inheritance proposed by Mendelian genetics. Mendelian inheritance can be visualized using Punnett squares. The first row and column represent the parental alleles, while the squares predict the possible combination of alleles of the resulting offspring. Dominant alleles are indicated by uppercase letters while recessive alleles are indicated by lowercase letters. The combination of alleles in…
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