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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 13, Problem 1GP
Textbook Problem
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Mendel crossed a true-breeding pea plant with green pods and a true-breeding pea plant with yellow pods. All the F1 plants had green pods. Which color is recessive?

Summary Introduction

To explain: The recessive color of the pea plant when the F1 generation has green pods whose parents were true-breeding green pods and yellow pods.

Concept introduction: Gregor Johann Mendel is the father of genetics. He performed simple experiments with garden pea plants. He then proposed three laws for allele expression, segregation of alleles, and assortment of gametes. Allele is the modification of the gene. Alleles are of two types namely dominant and recessive. True-breeding plants are those that have the same trait expressed for several generations and thus have homozygous dominant or recessive alleles in them.

Explanation of Solution

Alleles are variations of the same gene present in the similar locus of the homologous chromosomes. Dominant allele refers to the strong expression of the gene. Recessive allele refers to the low level expression of the gene. In homozygous condition, these alleles express their trait. In heterozygous condition, the dominant gene masks the effect of the recessive allele, and only the character or trait of the dominant allele will be expressed...

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