If the gene for myoglobin is "knocked out" in mice,the mice:
A)have larger lungs.
B)respire extremely rapidly.
C)have dark brown muscle tissue.
D)appear normal,with lighter colored muscle tissue.
E)have their growth stunted.

Question

Quizplus · Accepted Answer

Myoglobin is a protein that stores oxygen in muscle tissue, allowing for efficient oxygen transport during periods of low oxygen availability. Knocking out the gene for myoglobin would result in lighter colored muscle tissue, but the mice would still appear normal and their growth would not necessarily be affected. Larger lungs or rapid respiration would not be a direct effect of myoglobin gene knockout. Dark brown muscle tissue is actually the normal coloration that results from myoglobin presence, so its absence would not lead to this characteristic.

If the Gene for Myoglobin Is "Knocked Out" in Mice,the