Chapter 11, Problem 2STP

Summary Introduction

Introduction:

Homologous chromosomes are pairs of chromosomes that have the same length, centromere position, pairs together during meiosis and have the same gene sequence. They are similar but not exactly identical. They carry the same genes in the same order but the alleles for each trait may be different on each chromosome. This ensures that the phenotypes are different for the same genes.

Answer to Problem 2STP

Correct answer :

The correct answer is option A. 1 and 2

Explanation of Solution

Explanation/justification for the correct answer:

Option A. 1 and 2− In the given figure, the chromosomes 1 and 2 form the homologous pair. Hence this is the correct option.

Explanation for incorrect answer:

Option B. 3 and 4- Chromosomes 3 and 4 are sister chromatids and not homologous pair. Hence this is not the correct option.

Option C. 3 and 6- Chromosomes 3 and 6 are not homologous chromosomes. Hence this is not the correct option.

Option D. 7 and 8- Chromosomes 3 and 6 are not homologous chromosomes so this is not the correct option.