People with two copies of the sickle cell gene have the disease. People who carry only one copy of the sickle cell gene do not have the disease, but may pass the gene on to their children. Abnormal hemoglobin, called hemoglobin S, causes sickle cell disease (SCD). The problem in hemoglobin S is caused by a small defect in the gene that directs the production of the beta globin part of hemoglobin. This small defect in the beta globin gene causes a problem in the beta globin part of hemoglobin, changing the way that hemoglobin works.
Answer:
D
Explanation:
One of the assumptions of the Hardy Weinberg equilibrium is that the population should not experience mutations. Mutations are usually the base on which natural selection acts by selecting the advantageous alleles and weeding out the disadvantageous ones. This is how populations evolve.
Other assumptions of this equilibrium are; there should be no migration (hence gene flow), the population is infinitely large, and mating is random.
All cells of multicellular organisms have similar needs. The similarity in the needs of these cells have resulted to the similarity in the structure and organelles of the cells. The general structure is that there is a surrounding membrane around a solution containing enclosed genetic material, a powerhouse, and a protein synthesis area (animal cells).
The size of stomata to check transpiration
Answer:ATTACTGGTC
Explanation:
In dna, A pairs with T, and G pairs with C
