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Why cell have same number of chromosomes before process begin and end?
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What happens before meiosis begin?
Interphase. The process of meiosis has many similarities to the process of mitosis: chromosomes replicate before the process begins, and shorten and thicken to look like the chromosomes at the beginning of mitosis (condensation).
What must happen before meiosis begins?
A duplication of the chromosomes is what must happen before meiosis can begin.
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.
Which period are chromosomes duplicated in?
During the cell cycle, chromosomes are duplicated during the interphase.
What is the phase of mitosis when chromosomes become visibly shortened and thickened?
Prophase
What happens before meiosis begin?
Interphase. The process of meiosis has many similarities to the process of mitosis: chromosomes replicate before the process begins, and shorten and thicken to look like the chromosomes at the beginning of mitosis (condensation).
What must happen before meiosis can begin?
DNA replicates and forms tetrad—APEX.
What k must happen before meiosis can begin?
A duplication of the chromosomes is what must happen before meiosis can begin.
What is the Stage where chromosomes begin to move apart?
It is a process during mitosis called anaphase.
Why must gametes be haploids?
It must join with the other gamete to form a diploid number of chromosomes. If it had a diploid number to begin with, the result would be twice the normal amount of chromosomes. A normal cell had "2n" number of chromosomes, and each gametes have "n". If they had "2n" to begin with, the resulting zygote would have "4n", which is clearly not normal in human genome.
What must happen before meiosis begins?
A duplication of the chromosomes is what must happen before meiosis can begin.
What must happened before mitosis can begin?
The chromosomes must be duplicated. the real answer: DNA replicates and forms tetrads
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 egg cell?
Twenty-three chromosomes are in a human egg cell. 22 are autosomes, the other is an X chromosome.
Which period are chromosomes duplicated in?
During the cell cycle, chromosomes are duplicated during the interphase.
What stage in mitosis does the chromosomes uncoil happen?
During the telophase phase, the chromosomes begin to uncoil. There are six phases with mitosis and telophase is number four.
Stage when chromosomes begin moving apart?
Anaphase
