Why might identical copies of a gene at nonhomologous loci be maintained?

What will be an ideal response?


Ans: One possibility is that, although they encode the same polypeptide, they are expressed at different times or in different tissues. Another possibility is that additional copies are necessary to produce sufficient quantities of the gene product.

Biology & Microbiology

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It has been determined from several human disease samples that bacteria exist that are 16S rRNA sequenced to be Gram-positive, but morphologically double-membraned like Gram-negatives, therefore requiring a new class. 

Answer the following statement true (T) or false (F)

Biology & Microbiology

Which of the following microscopes uses visible light?

a. Scanning electron microscope b. Confocal microscope c. Scanning acoustic microscope d. DIC e. Fluorescence microscope

Biology & Microbiology

Compare and contrast infection with Taenia saginata and Echinococcus granulosus in humans, including the consequences of the infections.

What will be an ideal response?

Biology & Microbiology

What is the only known eusocial mammal?

A. humans B. naked mole rats C. beavers D. prairie dogs E. honeybees

Biology & Microbiology