Answer:
b- a genetic mutation must have occurred
Explanation:
Since sickle cell is a recessive trait, having a capital letter can make someone have a chance of just being a carrier of the gene.
Mendel realized that the principles of probability could be used to predict the results of genetic crosses.
Air that moves horizontally between high and low pressure zones makes wind. The greater the pressure difference between the pressure zones the faster the wind moves. Convection in the atmosphere creates the planet's weather.
Hope that helps:)
In the pulmonary circuit, veins carry oxygen rich blood, and in the systemic circuit, veins carry oxygen poor blood.
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Pulmonary and Systemic Circuit of the Cardiovascular system</h3>
The Cardiovascular System concerns all relations and interaction with the heart . It consists of
- Systemic circuit
- Pulmonary Circuit
The Systemic circuit is responsible for carrying oxygenated blood away from the heart and pumps it towards the organs and tissues of the body and returns it to back to the heart as deoxygenated blood
While the Pulmonary Circuit carries deoxygenated blood away from the heart towards the lungs and also brings it back as oxygenated blood to the heart again.
Read more on the Pulmonary and Systemic Circuit here: brainly.com/question/9705408
