0
What else can I help you with?
Why does some people only have 45 chromosomes?
Well down syndrome is causes by the 21st chromosome of a sex cell doubling, and so once fertilisation with the egg commences there will be 3 21st chromosomes. When you have 45 their is multiple things that can happen, the only consistent one is Turner Syndrome, which basically stunts puberty. This only happens in females and it is when they have X instead of XX.
The phase of mitosis that ends when the chromosmnes stop moving?
The phase of mitosis that ends when the chromosomes stop moving is called metaphase. In metaphase, the chromosomes align along the cell's equator, and the spindle fibers attach to the centromeres of each chromosome. Once the chromosomes are properly aligned, the cell can proceed to the next phase of mitosis.
After replication how many chromosomes exist?
46 duplicated chromosomes. humans have 23 types of chromosomes (n), each with a homologous pair (1 from mom, 1 from dad) giving us 46 total (2n). When cells undergo replication they duplicate all their chromosomes. The duplicate remains attached to the original chromosome by a centromere. The two attached duplicates are called sister chromatids (this is what you see as an x shaped chromosome- 1 chromosome, 2 sisters) which will be pulled apart during anaphase, giving each cell, once they divide, a full set of 46 chromosomes.
What is once a year called?
Once a year is called an annual event.
How many x-chromosomes in boys bodies?
There's not really a number. Its complicated. The 23 chromosome pair is the gender one. If you're female, you have two X chromosomes. If male, an X and a Y. There's really only that. If you want to be technical, every sperm in the body does has an X-chromosome, but I highly doubt that's relevant
What is the x-chromosome?
One of the two types of sex chromosomes, present twice in female cells and once in male cells.
What can one half of a duplicated chromosome be referred as?
A chromatid is one-half of two identical copies of a replicated chromosome. During cell division, the identical copies are joined together at the region of the chromosome called the centromere.Joined chromatids are known as sister chromatids. Once the joined sister chromatids separate from one another in anaphase of mitosis, each is known as a daughter chromosome.Chromatids are formed from chromatin fibers.Bailey, Regina. "Chromatid." ThoughtCo, Apr. 17, 2017.
What is difference between chromosome and chromatids?
A chromatid is one-half of two identical copies of a replicated chromosome. During cell division, the identical copies are joined together at the region of the chromosome called the centromere. They are known as sister chromatids. Once the paired sister chromatids separate from one another in anaphase of mitosis, each is known as a daughter chromosome. [source: About.com/Biology, see link below]
When is every chromosome connected to a spindle fiber in mitosis?
Just after the nuclear membrane dissolves and once the chromosomes have cloned themselves to form two chromatids connected by a centomere. The spindle fibers then attach to each chromosome.
How many rounds of chromosome replication occur in the cell?
One round of chromosome replication occurs in the cell during the S phase of the cell cycle. This results in each chromosome being duplicated, producing two identical DNA molecules called sister chromatids that are connected at the centromere.
Present day Sudan was once called?
Some previous names for present day Sudan include Kush and Kerma.
When chromosome become visible at the beginning of cell division what does each chromosome consist of?
Each chromosome consists of two identical sister chromatids that are held together by a centromere. These sister chromatids contain the genetic information needed for the cell to function and are divided evenly between the two daughter cells during cell division.
Which present day country covers much of the region once called Asia minor?
Africa
Which present-day country covers much of the region once called Asia Minor?
The Asia Minor today is called Turkey
Why does some people only have 45 chromosomes?
Well down syndrome is causes by the 21st chromosome of a sex cell doubling, and so once fertilisation with the egg commences there will be 3 21st chromosomes. When you have 45 their is multiple things that can happen, the only consistent one is Turner Syndrome, which basically stunts puberty. This only happens in females and it is when they have X instead of XX.
Chromosomes are called what once they have duplicated in preparation for division?
During prophase, the chromosomes in a cell's nucleus condense to the point that they can be viewed using a light microscope. ... Because each chromosome was duplicated during S phase, it now consists of two identical copies called sister chromatids that are attached at a common center point called the centrome or chromosomal duplications
Fossils formed when an organism dissolves and leaves an empty space in a rock are called?
Voids left behind by once present fossils are called 'trace fossils'.
