The best evidence would be two of her sons having hemophilia while one does not.
<h3>Hemophilia</h3>
Hemophilia is a sex-linked recessive disorder. This means that females can be homzygous normal, heterozygous, or affected by the disorder while males can either be normal or affected.
Why? This is because males have only one X chromosome (XY) while females have 2 X chromosomes (XX).
Also, the X chromosomes in males are always from their mothers while their Y chromosomes come from the father.
So, if the two X chromosomes of Irene are normal for hemophilia, none of her sons should be affected. If the two X chromosomes are affected, all her sons will have the disorders.
When one X chromosome is affected and the other is normal, it means that some of her sons will inherit the affected chromosome and have the disorder while some will inherit the normal chromosome and will be free from hemophilia.
More on hemophilia can be found here: brainly.com/question/18916729
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Global winds, The Coriolis effect, and continental deflection
Answer:
The muscular wall of the left ventricle is thicker than that of the right ventricle because the left ventricle requires higher forces to carry out its function- pumping blood through the systemic circuit.
Explanation:
The ventricles are located at the bottom of the heart. Their main function is to collect and pump blood to the rest of the body.
The right ventricle pumps deoxygenated blood into the lungs via the pulmonary artery. It requires a low pressure to carry this function out.
The left ventricle pumps oxygenated blood to all the tissues in the body. As a result, it requires higher forces than the right ventricle. Therefore, the muscle wall of the left ventricle is thicker than that of the right ventricle (it is the thickest of all the heart chambers).
