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
GenaCL600 [577]
3 years ago
14

After fertilization a zygote forms. The cells then go through mitosis. Explain how this bundle of cells eventually forms a human

with specialized cells (i.e. liver cells, blood cells, neurons, etc.)
Biology
1 answer:
yaroslaw [1]3 years ago
8 0

Answer:

Human fertilization and development

Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg.

Stages of human development

Zygotic stage: The zygote is formed when the male gamete (sperm) and female gamete (egg) fuse.

Blastocyst stage: The single-celled zygote begins to divide into a solid ball of cells. Then, it becomes a hollow ball of cells called a blastocyst, attaching to the lining of the mother's uterus.

Embryonic stage: The major internal organs and external features begin to emerge, forming an embryo. In this stage, the heart, brain, and spinal cord become visible. Arms and legs start to develop.

Fetal stage: Once the formed features of the embryo begin to grow and develop, the organism is considered a fetus. Differentiation and specialization of structures happens during this time.

Development overview showing the progression from zygote to blastocyst to embryo to fetus.

Development overview showing the progression from zygote to blastocyst to embryo to fetus.

Differentiation and apoptosis

During development, the number of cells must increase through division so that body axes, tissues, organs, and structures must form. Individual cells become specialized in their structure and function through the process of cell differentiation.

Unnecessary cells also must be removed in order to help form important structures. This occurs is through the process of apoptosis. For example, human hands start out as a paddle-like block of tissue. Eventually, the block was “carved” into fingers by apoptosis of the cells in between the developing fingers.

Microscope images from a scientific paper, showing a developing mouse paw. The cells between the developing digits are stained by a marker that indicates apoptotic cells.

Explanation:

You might be interested in
What is fragmentation ?
finlep [7]

Fragmentation is the breaking of the body into parts and then the organism develops all the parts of the body. The fragmentation is the type of reproduction in lower organisms. The fragments which are produced can develop into new organisms.

6 0
2 years ago
Read 2 more answers
Why in many living organisms (with exception of some viruses) only DNA, but not RNA, is the main source of genetic information?
agasfer [191]

Answer:

because \: dna \: is \: both \: more \: resilient  \\ \: and \: easly \: repairble \: than \: rna \:  \\ therefore \: dna \: serve \: as \: more \\  \: stable \: carrier \: of \: genetic \: information \:  \\ thank \: you

4 0
2 years ago
Read 2 more answers
How to identify oxygen and carbon dioxide?<br>​
Genrish500 [490]

Answer:

Place a glowing splint in the test tube, and if it reignites, it could be oxygen. Place a burning splint into a test tube, and if it goes out, it could be carbon dioxide. Or, place carbon dioxide gas in limewater, and if it turns milky and gets chunks, it is carbon dioxide.

6 0
3 years ago
Read 2 more answers
Indicate whether each of the following occurs mainly in G1 phase (G), S phase (S), or G2 phase (H) of the cell cycle. Your answe
Ronch [10]

Answer:

Correct choice should be:

"SGSG"

Explanation:

The cell cycle consists of G1, S, G2 and M phase. The former three phases include the interphase and M phase is the dividing phase of cell . G1 prepares cell for DNA synthesis. S phase is the phase where DNA replication takes place. G2 phase prepares cell for cell division or M phase.

G1 phase preceeds replication or S phase and G1 phase licences DNA replication.

During other phases of cell cycle, ORC complex masks origin of replication. ORC phosphorylation takes place at S phase, which removes this omplex and unmasks origin of repication site so that replication machinery can bind to it.

DNA helicase activation: S phase

DNA helicase deposition on DNA at the replication origins: G phase (actually G1)

ORC phosphorylation: S phase

Licensing of replication origins : G phase (actually G1)

Hence correct choice should be:

SGSG

5 0
3 years ago
Incoordination of the muscles during movement is known as:
Masja [62]
Incoordination of musles during movement is known as ataxia.
5 0
3 years ago
Other questions:
  • What happens during the G1 phase of interphase
    13·1 answer
  • Someone Help me PLEASE.
    12·1 answer
  • An object's velocity can be described by its speed and acceleration<br><br> true or false?
    14·2 answers
  • Consider a series of metabolic events during fasting. Within a few days after a fast begins, nitrogen excretion accelerates to a
    5·2 answers
  • 3<br> In an inverse relationship one variable decreases when another variable incerases.
    13·1 answer
  • After eating a meal, blood sugar levels are elevated. The body secretes hormones to help absorb excess sugar into cells and retu
    7·2 answers
  • Explain why the amount of water a person needs to survive can be highly variable.
    6·1 answer
  • While playing soccer in your backyard, you disrupt a small fire ant mound. The fire ants emerge and bite your feet. Your feet be
    15·1 answer
  • What is the purpose of a food chain?
    10·2 answers
  • What is the relationship between changing CO2 emissions and CO2 concentration?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!