1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
icang [17]
3 years ago
9

Please hurry

Biology
1 answer:
andre [41]3 years ago
7 0

Answer:

Explanation:

1     Long term exposure to harmful genotoxic chemicals or ionizing radiation can cause changes in the base sequence of DNA.Chemicals might induce DNA mutations, such as polycyclic hydrocarbons (fumes found in oil stations, or smoke from a tobacco cigarette), intercalating agents such as Ethidium Bromide (carcinogen), but also radiations such as UV-radiation (C and T bases are most vulnerable and would bind to identical bases unstead of their

2    Genetic changes that are described as de novo (new) mutations can be either hereditary or somatic. In some cases, the mutation occurs in a person’s egg or sperm cell but is not present in any of the person’s other cells. In other cases, the mutation occurs in the fertilized egg shortly after the egg and sperm cells unite. (It is often impossible to tell exactly when a de novo mutation happened.) As the fertilized egg divides, each resulting cell in the growing embryo will have the mutation. De novo mutations may explain genetic disorders in which an affected child has a mutation in every cell in the body but the parents do not, and there is no family history of the disorder.

Somatic mutations that happen in a single cell early in embryonic development can lead to a situation called mosaicism. These genetic changes are not present in a parent’s egg or sperm cells, or in the fertilized egg, but happen a bit later when the embryo includes several cells. As all the cells divide during growth and development, cells that arise from the cell with the altered gene will have the mutation, while other cells will not. Depending on the mutation and how many cells are affected, mosaicism may or may not cause health problems.

You might be interested in
What is the meaning of word "true" in biology?<br> for example true breeding plants
vaieri [72.5K]

A true-breeding plant is one that, when self-fertilized, only produces offspring with the same traits. True-breeding organisms are genetically identical and have identical alleles for specified traits. It is a kind of breeding wherein the parents would produce offspring that would carry the same phenotype. Basically true means identical or same. Hope this somewhat helped :)

4 0
3 years ago
Why is a lack of oxygen fatal to cells?
sveticcg [70]
Oxygen is a vital element within cellular respiration. An intrinsic part of the cellular respiration cycle is the transfer or electrons through the electron transport chain, and at the end of it exists the mitochondria, in which electrons are donated to the Oxygen and combine with hydrogen ions to form water.
6 0
3 years ago
Which one is it A, B, or C
Bond [772]

Answer:

B

Explanation:

7 0
3 years ago
A muscle cramp is a sudden, painful contraction of a muscle, during which movement is difficult. What is happening at the cellul
rewona [7]

Answer:

The correct answer would be B

Explanation:

6 0
3 years ago
Which type of vertebrate does each skeletal figure below represent?<br>Please help!!!!!!
LenKa [72]

Answer:

There is nothing below

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the name of the subatomic particle that holds a neutral charge?
    5·1 answer
  • The human genome contains approximately 20,000 protein-coding genes, yet it has the capacity to produce several hundred thousand
    12·1 answer
  • The toes are posterior to the heel true or false
    12·1 answer
  • How does a bony fish use the swim bladder?
    6·1 answer
  • What causes variations in asexual organisms?
    6·1 answer
  • RNA is translated into protein by using ______________
    8·1 answer
  • A population has 1000 individuals. A PCR analysis of the genotypes of a gene associated with Lactase persistence are: LL = 450 L
    12·1 answer
  • What the effects of sunlight on the aquatic life inhabiting your body of water on the Indian ocean?
    13·1 answer
  • Which of the following is not true of neutron stars?
    12·1 answer
  • Which statement describes an advantage of sexual reproduction?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!