The frequency of the sickle cell allele in areas where malaria is introduced will increase and it will be advantageous.
When a person is heterozygous for sickle cell anemia, it means it has one abnormal allele of the hemoglobin beta gene but doesn’t express the disease (like homozygous person).
On the other hand, a person heterozygotes for sickle-cell trait has a selective advantage in environments where malaria is present.
Remember gcau, G pairs with C and A pairs with u G-C A-U
From the TOP TO BOTTOM it is tertiary 1
secondary 10
primary 90
Producers 100
Explanation:
Answer:
A diving regulator is a pressure regulator that reduces the pressure of gas in the tank and deliver it to the diver so that he/she can breathe easily. It must pass the controlled laboratory testing and must have a second adjustment knob to ensure ease of breathing. Modern regulators are precision made and designed to work under demanding conditions. 1st stage and 2nd stage, diaphragm and piston, exhaust valve and purge button are types of diving regulators.
