My answer will be that the letter "A" in the chromosome refers to "adenine", which is considered as one of the five nitrogenous bases that are part of the nucleic acids (DNA and RNA), which was named in 1885 by Albrecht Kossel.
Huntington's disease is caused by a mutation of the HD gene, which contains extra copies of the nucleotide sequence CAG, which encodes extra copies of the amino acid glutamine into the protein Huntingtin. Mutations in the HTT gene causes Huntington disease. The HTT gene provides instructions for making a protein called huntingtin. This protein appears to play an important role in nerve cells in the brain. The HTT mutation that causes the disease involves a DNA segment known as CAG trinucleotide repeat. In one part of the chain of amino acids in Huntingtin protein there is a long string of amino acid glutamine.
According to the characteristics of this organism, it is classified into the Protist kingdom, which brings together unicellular or simple multicellular organisms that do not form tissues, both autotrophic and heterotrophic.
<h3>What is the kingdom protista?</h3>
It includes eukaryote-type organisms that, due to their characteristics, cannot be included in the rest of the kingdoms of this class.
Although most protists are unicellular, there are also multicellular protists and they can have autotrophic or heterotrophic metabolisms.
Therefore, we can conclude that the protist kingdom groups living beings that have cells belonging to the eukaryote group.
Learn more about Protist kingdom here: brainly.com/question/26845151
Answer:
dontknobecauseitsnotenglish
Explanation:
i pefer english
The answer is A; the horizon.