Answer:
It is difficult to tell if fluoride causes this cancer.
Explanation:
The U.S. public health service has diverse team with more than 6500 employees. Their mission is to promote health and safety of the people of United States. The fluoride is added to drinking water since 1940s and this process is called water fluoridation. It is difficult to tell if the fluoride causes cancer but there has not been any relationship found between fluoridated water and cancer. Fluoridated water can reduce and reverse the tooth decay.
Supercoiling is an important property of DNA tertiary structure that affects essential processes such as replication and transcription. Negative supercoiling is very important. Negative supercoiling causes unwinding of DNA and it makes the DNA strand ready for biological processes such as replication and transcription. Negative supercoiling is introduced in a DNA with the help of enzyme topoisomerase enzymes I and II. In bacteria topoisomerase enzyme II is called gyrase.
When parents provide a different allele of a given gene, then the offspring is called as heterozygous for that allele. Alleles turn out phenotypes or physical versions of an attribute that are either dominant or recessive.
The dominance or recessivity related to a specific allele is the result of masking, by that, a dominant phenotype hides a recessive phenotype. By this logic, in heterozygous offspring, solely the dominant phenotype is apparent.
