Question

Which of the following is the most widely-used model organism for the study of mammals, with a genome size of about 2.6 billion base pairs (containing approximately 20,000 protein-coding genes)?

A. Saccharomyces cerevisiae B. Escherichia coli C. Drosophila melanogaster D. Mus musculus E. Arabidopsis thaliana

Answer 1

Solution:-

S.cerevisiae genome is composed of about 12,156,677 base pairs and 6,275 genes.

E.coli genome has about 4 million base pairs with about 3000 genes.

Drosophila melanogaster sequenced genome of 139.5 million base pairs has been annotated and contains around 15,682 genes.

Mus musculus genome contain around 3 billion base pairs and estimated to have 50,000 genes.

Arabidopsis thaliana is useful for genetic mapping and sequencing with about 135 mega base pairs and five chromosomes. It is one of the smallest genome among plants.

So, the correct option is (D) Mus musculus.