The frequency of the recessive allele for the Hbs gene when there is an outbreak of malaria will increase.
The sickle hemoglobin is produced by the HbS gene, a variation of the B-globin gene. A person who possesses two recessive alleles is said to have the genetic condition known as sickle cell anemia.
People who are heterozygous have the advantage of having normal and sickle hemoglobin, so they are more resistant to malaria because malaria will only act on normal hemoglobin, increasing the prevalence of the recessive allele of the HbS gene.
However, the malarial parasite only affects hemoglobin which is normal, making heterozygous people more resistant to the disease. Hence, the frequency of the recessive allele for the Hbs gene when there is an outbreak of malaria will increase.
To learn more about malaria refer to:
brainly.com/question/3895081
#SPJ4
Answer:
ureters
Explanation:
The ureters are two tubes that drain urine from the kidneys to the bladder. Each ureter is a muscular tube that drains into the bladder. Smooth muscle contractions in the walls of the ureters, over time, send the urine in small spurts into the bladder, the organ where urine is stored before it can be eliminated.
She should inform the students that the spinal cord is the pathway for impulses from both the brain to the body and the body to the brain. It is the central connection of nerves to the brain. It connects from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It also manages coordinate reflexes managed by the nerves in the spinal cord.
Answer:
Over time, many species gradually adapted to a more oxygen-rich enviroment, allowing them to survive in shallow water and on land.
