Centrosome Duplication is Tightly Coordinated with Cell Cycle Progression
What restores the number of chromosomes?
During reproduction, when the sperm and egg unite to form a single cell, the number of chromosomes is restored in the offspring. Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
How is the normal number of chromosomes restored?
During meiosis the cell produces gametes, or germ cells, each containing half the normal or somatic number of chromosomes. This condition is called haploidy. When two germ cells (e.g., egg and sperm) unite, the diploid condition is restored.
Which of the following events restores the number of chromosomes to the diploid state?
The process of meiosis produces genetically unique reproductive cells called gametes, which have half the number of chromosomes as the parent cell. Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition.
How is the number of chromosomes restored in the next generation?
When the sperm and ovum fuse during fertilization, the resulting zygote will be diploid due to fusing of the chromosomes of sperm and ovum. Thus the chromosome number is re-established in the offspring.
Which process restores diploid?
The process of meiosis produces unique reproductive cells called gametes, which have half the number of chromosomes as the parent cell. Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition.
What is metaphase II?
Metaphase II is the second stage in meiosis II. … The cell is in metaphase II when the chromosomes align themselves along the metaphase plate through the facilitation of the spindle fibers. The spindle fibers are now attached to the two kinetochores contained in the centromere of each chromosome.
How is the diploid number restored in diploid organisms?
The Diploid condition of an organism is restored by Fertilisation. as you can see in this pic , egg and sperm which are haploid fuses to form the diploid zygote which is the first diploid cell.
Which of the following best describes how a diploid number of chromosomes is restored?
Which of the following best describes how the diploid number of chromosomes is restored in the offspring of these organisms? … Meiosis produces daughter cells with half the number of chromosome sets of the parent cell; therefore, the parent cell must be diploid.
How does a diploid organism restore its number of chromosomes If meiosis produces haploid cells?
If meiosis produces haploid cells, how is the diploid number restored for those organisms that spend most of their life cycle in the diploid state? … Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis II.
What is metaphase?
Metaphase is the third phase of mitosis, the process that separates duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. … There is an important checkpoint in the middle of mitosis, called the metaphase checkpoint, during which the cell ensures that it is ready to divide.