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
natali 33 [55]
3 years ago
15

The phase of the cell cycle associated with the doubling of the amount of dna in the cell is

Biology
1 answer:
tresset_1 [31]3 years ago
8 0

Answer:

Interphase (Synthesis stage)

Explanation:

Before a cell can undergo division (mitosis), it must first make a copy of its genetic material which each daughter cell will have. This process of DNA replication takes most of the time of the cell cycle, making the interphase, specifically the S phase, the longest phase of the cell cycle. The interphase stage occurs in three steps:

1. G1 phase: This is also called the first gap phase. The cell is biochemically active at this stage, hence it grows physically larger and makes copies of its organelle. The cell also accumulates building blocks of DNA molecules.

2. S phase: Also called Synthesis phase, the cell makes a copy of its DNA in its nucleus. DNA material (uncoiled chromatin) is replicated into two identical pairs. The centrosomes, which gives rise to the mitotic spindle, is also replicated. These spindles separate the sister chromatids during mitosis.

3. G2 phase: This is also called the second gap phase. It is the last step of interphase before mitosis begins. The cell makes protein and prepared for mitosis by rearranging its contents. It ends when mitosis begins.

You might be interested in
According to the theory of plate tectonics, which forces cause the movement of plates in the earth's crust? A. convection and gr
Oksana_A [137]
Convection currents and graviety
4 0
4 years ago
A man with the autosomal recessive disorder phenylketonuria (PKU) and a woman without PKu heve a son named Peter, who does not h
Anton [14]

Answer:

<h2>2. Peter's maternal grandfather has PKU.</h2>

Explanation:

  • Such type of the genetic disorder in which two copies of a gene must be mutated at a time is called autosomal recessive disorder such as sickle cell anemia, phenylketonuria, and some other diseases.
  • When a sing copy of a gene is mutated in a person then this disorder is not appeared and the person is called a carrier.
  •  So when a child is born by two carrier parents then there is a chance that a child will be affected if both the parents donate mutated genes.
  • In the case of Peter, since peter does not show this defect this means his maternal grandfather was affected by this disorder.

5 0
3 years ago
If no carbon dioxide is present in your test tube it will be a______Color. If a medium amount of CO2 is present, your test tube
Effectus [21]
Black for the first, Brown for the second, And, White for the third. Hope that his helps you..
3 0
3 years ago
Read 2 more answers
Explain the biological structure hierarchy of the human body and the role of homeostasis in maintaining the body. Include the fo
Nuetrik [128]

Answer:

1. Biological structure of the human body

The human body is organized in different levels according to their complexity.

The levels are the folowing (increasing complexity).

1. Atom (N, O, C,..)

2. Molecule (Protein, lipids, water...)

3. Organelle (mitochondria, golgi apparatus,...)

4. Cell (blood cells, bone cell,..)

5. Tissue (connective tissue, epithelial tissue,..)

6. Organ (lungs, kidney,..)

7. Organ system (skeletal system, muscuar system,...)

8. Organism (the human body)

Each of the levels is formed by an agrupation of the previous level. For example, cells are formed by a number of organelles, and a group of cells form a tissue.

Cells are the basic units of structure of the body, and there are different types of them.

2. Homeostasis

Homeostasis is a process of the body by which the organism works to maintain a stable internal environment, while adjusting to changes in the external environment.

This process is possible because of the work of both the nervous system and the endocrine system. While the first controles the body's activities and detects the necesity of adjustments, the second regulates the activities by using hormones.

6 0
1 year ago
"reinforcement is most likely to occur when ________."
Troyanec [42]
Answer B did this a few ago
3 0
3 years ago
Other questions:
  • Rabia is using a relaxation technique in which she systematically contracts and releases different muscle groups. What is the te
    7·1 answer
  • People whose wants are satisfied by using goods and services are
    9·2 answers
  • An albino woman marries a phenotypically normal man with no family history of albinism. What percentage of their children are li
    11·1 answer
  • What are agronomic characters of potato? How it is beneficial for the farmer?
    11·1 answer
  • Hi guys please tell me what r the methods to stop growth of population please answer it's urgent​
    6·2 answers
  • Why are we interested in using nuclear fuel to get to Mars?
    10·1 answer
  • An animal cell: the human body. Different but also alike. Your brain is the control center of your body. What is the control cen
    9·2 answers
  • Why is one side of the moon called "the dark side of the moon"? ​
    7·1 answer
  • CONSIDERAS QUE ES CORRECTO DECIR QUE LOS ANTIBIOTICOS SON MALOS PARA LAS BACTERIAS? Argumenta tu respuesta
    12·1 answer
  • Practice Problem
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!