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Chromosomes
Chromosomes contain the genetic material DNA
1,309 Questions
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How many chromosome are in a egg?
Eggs and sperms are gametes. They are haploid. Haploid means that they have half the regular number of chromosomes. This works really well because an egg and a sperm join together to begin a new organism which will then have the entire diploid number of chromosomes. A human body cell would have 46 chromosomes. Since a human egg cell is a reproductive cell (sex cell), it would contain only half the number of chromosomes as a body cell. Thus, a human egg cell would have 23 chromosomes.
A sex cell has half the number of chromosomes for a good reason. When two sex cells reproduce, they combine to form double the number of chromosomes. So when two cells with 23 chromosomes each reproduce, the offspring would have 46 chromosomes. To keep humans at 46 chromosomes per cell, sex cells are produced through meiosis, which is a process that creates cells with half the number of chromosomes.
How many chromosomes are in a cell that was formed from a sperm and egg cell?
Twenty-three chromosomes are in a cell that is formed from a sperm and egg cell.
What role do chromosomes play when a cell make proteins?
They contain the information to make the proteins.
The genes on the x and y chromosomes are called what?
The genes carried on the X and Y chromosomes are called your "sex chromosomes".
What is the number of chromosomes in the seed of dicotyledon?
It makes no difference if it is monocotyledonous or dicotyledonous; if it is a seed it already has a full compliment of chromosomes and is diploid (2n).
Only pollen and ovules are haploid (n)
How many Chromosomes are there in one human Somatic Cell?
A buccal smear (pronounced "buckle") is the painless removal of a sample of cells from the lining of the mouth (inside of the cheek) for study.
Alternative NamesSex chromatin test
How the test is performedThe health care provider will gently scrape the inside of the cheek with a small spatula to collect cells for testing.
How to prepare for the testRinse and wash the mouth as instructed.
How the test will feelYou will feel a scraping sensation as cells are removed from the cheek.
Why the test is performedThe procedure is used to obtain cells for chromosome and DNA analysis,most often for genetic testing. The International Olympic Committee adopted the test many years ago to help detect male imposters among female athletes. When the test is used in this way, it's called the sex chromatin test. This method may also help establish the sexual identity of newborns.
What the risks areThere are no risks.
Reviewed ByReview Date: 12/15/2010
Frank A. Greco, M.D., Ph.D., Director, Biophysical Laboratory, The Lahey Clinic, Burlington, MA. Review provided by VeriMed Healthcare Network. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
How long can a human sex lasts?
Theoretically, sexual intercourse can last many hours. In real life, the average time is roughly fifteen minutes.
Is DNA stored in cytoplasm or chromosome?
DNA is primarily stored in the chromosome within the cell nucleus. Some DNA is also present in the mitochondria, which are located in the cytoplasm.
What is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.?
When is a bacterium's circular chromosome copied?
A bacterium's circular chromosome is copied during a process called DNA replication. This typically occurs before the bacterium divides through binary fission to ensure that each daughter cell receives a complete set of genetic information.
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What is the definition of sex chromosomes?
A sex chromosome helps in the determination of sex in an organism.
What could the chromosomes represent in a house?
Maybe the parents that maintain the house in good working order and directs the activities inside of it.
Is a centromere an organized display of an organism's chromosomes?
No, the centromere is not an organized display of an organism's chromosomes. A centromere is the point of the chromosome where it is attached to a spindle during cell division.
What cellular component helps pull apart the chromosomes in mitosis and meiosis?
The cellular component that helps pull apart the chromosome in mitosis and meiosis are the spindle fibers. These spindle fibers are made of micro-tubules.
Do aerobic respiration anaerobic respiration and fermentation release energy?
Yes they release energy from glucose and store in ATP.Fermentation also anerobic process.
What does is mean to have a extra y chromosome?
A very biased study was done in the 60's and 70's which incorrectly assumed certain behavior traits such as tallness and aggressive behaviour. The media exaggerated the traits in books and tv programs so that the general public was grossly misinformed. Today, we know that 47, XYY karyotypes are normal individuals with normal behavior and normal physical traits and is it a disservice to those who have the the extra y to be stigmatized in any other way but normal.
