<span>DNA methylation is a process that can change the activity of a gene without rearranging the DNA sequence. The mechanism most often is used to inactivate genes.</span>
Answer: Earth spins on its axis
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A lot of the energy from photosynthesis flows out as heat.
^answer
When energy is being transported or flowed through the ecosystem most of the heat is lost.
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The two categories would be Biotic and Abiotic
Answer:
A point mutation can be described as a mutation in which changes occur in a single nucleotide. A nucleotide may get changed, deleted or inserted from the sequence of DNA. Point mutations can be harmless or harmful depending on the nucleotide in which the changes occur.
A change in just one nucleotide can result in the formation of wrong amino acid and hence changed or wrong proteins can be formed. If the original protein was involved in cellular reproduction, then the entire process of reproduction can be affected by a point mutation.
Sickle- cell anaemia is a disease in which the body fails to produce enough healthy red blood cells. This disease occurs due to point mutation. Point mutation occurs where glutamine (GAG) of the β-globin gets changed into valine (GUG). This change causes the haemoglobin to get a deformed structure due to which it is not able to carry out oxygen.
