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What happens to the cell to form downsyndrome?
When cells form in an embryo (new baby), and cells split, their chromosomes all split in two, with one set staying in the original cell, and the other set going to the new cell. Sometimes, randomly, a chromosome set stays in the original cell, so it has 2 sets, and the new cell has none, at all. If this occurs with chromosome 21, Down syndrome can be the result.
Replication?
cell makes exact all DNA in order to split into two cells.
What does the inner cell mass become?
It becomes the embryo proper and some extra-embryonic membranes. First it specializes into an epiblast and hypoblast. The epiblast becomes the embryo proper and the hypoblast becomes the yolk sac.
For a cell to divide into two parts what would need to happen to all the organelles in the cell?
they need to split
How many weeks does it take for all the basic organs of an embryo to form?
it takes four weeks for the organs of an embryo to form..
What plays a role in cell division (Mitosis)?
all of the cell because all of the cell needs to split in half. but, the cytoplasm is the most needed
How many egg cell will meet sperm cell?
To create an embryo ONE egg and ONE sperm must meet. Males usually produce millions of sperm Females usually produce just a small number of eggs (depends on the animal) Once a sperm has fertilized the egg all the rest of the sperm are prevented from entering the newly created embryo.
How many week does it take for the embryo to develop all the basic organs to form?
The babies (embryo) heart starts to beat at about 4 weeks.
What is a cytoplasmic embryo?
* Cytoplasmic embryo or cybrid: where a human cell is inserted into an animal's egg that has been stripped of nearly all its nuclear DNA. The embryo would be 99.9 per cent human and 0.1 per cent animal.
What the zygote is?
A zygote is single cell which is formed immediately after fertilization . IT then converts to morula followed by blastula (ZYGOTE DIVIDED INTO 16-32 cells) WHICH GETS IMPLANTED IN THE UTERINE WALL . IT THEN DIVIDES TO FORM EMBRYO WHICH AFTER 9 MONTHS IS RECOVERED FROM THE MOTHER
Is stem cell research still cloning?
Cloning is asexual reproduction. There are all kinds of research that can be done on stem cells without creating any actual embryo or causing the gestation of an embryo in order to give birth to a new organism.
What pahse begin to separte into two cells?
Anaphase the cell starts to split from inside Telophaseit starts to split into 2 new cells and Cytokinesis phase its all complet
