Answer to Question #165676 in Genetics for Virat

Question

1) A large number of DNA disorders occur in human cells. Up to 10,000 DNA damage can be recorded

daily in our body. However, the action of genetic homeostasis mechanisms allows maintaining the relative

constancy of the cell genotype.

1. What do you know about the main ways to maintain genetic cell homeostasis? What are they

characterized by?

2. In what phases of the mitotic cycle can DNA damage be corrected?

3. What environmental factors can lead to genetic disorders?

4. What are the consequences of genotype violations in somatic cells if they are not corrected?

Answer 1

1.i) Obtaining sue energy

ii) Making of the new cell

iii) Exchange of material

iv) Elimination of wastes

To maintain homeostasis , the body reacts to an abnormal change (induced by a toxic substance , biological organism, or other stress) and makes certain adjustments to counter the change (a defense mechanism).

2. G1 phase: prevents the replication of errors by halting in this phase.

S phase: prevents the replication of errors by stopping replicon initiation inhibition.

G2: protects against mitotic errors by delaying the metabolic changes.

3. Temperature and Ultraviolet radiation from the sun

4.Somatic mutations can occur in any of the cells of the body except the germ cells (sperm and egg) and therefore are not passed on to children. These alterations can (but do not always) cause sporadic cancer or other diseases.