Answer:
X-linked recessive
Explanation:
Mostly males seem to manifest this trait
The second pair of ribs or the true ribs
Answer:
The following punnet square would be constructed from the above mentioned cross:
b b
B Bb Bb
B Bb Bb
A punnet square can be described as a diagram which is made to illustrate the outcomes of a cross.
The results from the above punnet square show that the offsprings produced from a cross between homozygous blue and brown parent, will all have blue feathers but they all will be heterozygous for the trait.
Systemic circulation is the one that oxygenates all the body.
Starting from the left atrium, through the left ventricle, and the aorta and its branches to the body.
After the tissues do the exchange, the deoxygenated blood goes back to the right atrium to starts the pulmonary circulation, and then the cycle starts again.