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Biology: The Unity and Diversity o...

14th Edition
Cecie Starr + 3 others
ISBN: 9781305073951

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

14th Edition
Cecie Starr + 3 others
ISBN: 9781305073951
Textbook Problem

The second-generation offspring of a cross between individuals who are homozygous for different alleles of a gene are called the _______.

  • a. F1 generation
  • b. F2 generation
  • c. hybrid generation
  • d. none of the above

Summary Introduction

Concept introduction: Monohybrid and dihybrid cross help to study the dominant allele and linking of the genes. The parents in the monohybrid and dihybrid crosses are true breeding and homozygous dominant or recessive for the given trait. The parents give rise to the heterozygous F1 generation. The F1 generation is self- crossed to give F2 generation.

Explanation

Reason for the correct answer:

The parents are homozygous for the various possible alleles of the genes that is either dominant or recessive. The parents produce the first filial generation represented as the F1 generation. The F1 generation is a hybrid of the parents and has the heterozygous allele of the gene, since the parents were homozygous. The F1 generation is either monohybrid or dihybrid. The F1 generation is self- crossed to give second filial generation denoted as the F2 generation.

Option b. is given as “F2 generation” and F2 generation is the result of the cross between the parents that were homozygous for different alleles of the same gene.

Hence, the correct answer is option b.

Reason for the incorrect answer:

Option a...

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