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Chapter 3: Q14. (page 78)

By how many nucleotides, on average, do the genomes of two Homo sapiens differ?

Short Answer

Expert verified

There is a one-nucleotide difference in the genomes of two Homo sapiens.

Step by step solution

01

Introduction

Nucleotides are the organic compounds having nucleoside (nitrogenous base and pentose sugar) and phosphate group. Adenine and guanine are purine nucleotides found in both DNA and RNA whereas cytosine and thymine is a pyrimidine nucleotides found in DNA and uracil in RNA.

02

Number of nucleotides differ between the genomes of two Homo sapiens.  

The human genome is made up of over three billion nucleotide base pairs spread over23 chromosomal pairs. According to human genome sequence studies, two randomly picked Homo sapiens genomes differ by only1 nucleotide per1000 on average. This indicates that two persons have a99.9% chance of being genetically similar.

03

Interpretation 

Thus, one nucleotide is differed between the genomes of twoHomo sapiens.

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