The main molecule found in nucleus is called DNA(deoxyribonucleic acid). This molecule is made of subunits called nucleotides. A nucleotide is made of a nitrogenous base that can be adenine, thymine, guanine or cytosine; a five carbon sugar called deoxyribose and a phosphate group. This molecule controns protein synthesis. Proteins are crucial to the cell's function.
Answer:
to prevent the spreading of germs
Explanation:
Answer:
Will never go to fixation.
Explanation:
Mutation is the sudden, heritable change in the genetic sequence of the organisms. The mutation might cause the particular disease in the organisms.
The gene fitness leads to the increase in the gene frequency in the upcoming generations. The gene will fix in the population when their i no selection and no mutation. Since, the information given in the question states that mutation is acting, so the A allele will never fix in the population.
Thus, the answer is option (c).
Complete question:
Question: Genes in different chromosomes _____ during meiosis. Genes that are very close together in the same chromosome are _____.
a) do not assort independently; unrelated
b) assort independently; unrelated
c) assort independently; linked
d) do not assort independently; linked
Answer:
c) assort independently; linked
Explanation:
During anaphase-I of meiotic division, homologous chromosomes are moved to the opposite poles of the cell. This segregation also separates the alleles of genes present on the chromosomes to the opposite poles. The segregation of genes is a random event which means that the alleles of one gene segregate independently of the alleles of some other gene. This requires that the genes are present on separate chromosomes.
The genes present close together on the same chromosomes are linked. This means that they are inherited together and do not exhibit independent assortment.
Answer;
A. A-delta fibers
A-delta fibers transmit pain that is sharp, nonchronic, and well localized.
Explanation;
-The information about touch and pain is transmitted to the spinal cord and brain by primary afferent axons - these are the nerve fibers connected to the different types of receptors in the skin, muscle and internal organs.
-The different nerve fiber groups are; A-alpha, A-beta, A-delta and C-nerve fibers.A-alpha, A-beta and A-delta nerve fibers are insulated with myelin. C-nerve fibers are unmyelinated.
-A-delta nerve fibers carry information related to pain and temperature. A-delta nerve fibers can conduct action potentials as fast as a sprinter in the Olympics.
