A zygote undergoes rapid cell divisions (cleavage) to form a spherical ball of cells: the blastula; this will further develop into a blastocyst. Does meiosis form a zygote? Meiosis is where a diploid cell gives rise to haploid cells, and fertilization is where two haploid cells (gametes) fuse to formRead More →
Interphase. Almost 80 percent of a cell’s lifespan is spent in the interphase, which is the stage between mitotic cycles. During interphase, no division takes place, but the cell undergoes a period of growth and prepares itself for division. What are the two major phases of mitosis? The major stagesRead More →
During prophase I, the chromosomes condense and become visible inside the nucleus. Because each chromosome was duplicated during the S phase that occurred just before prophase I, each now consists of two sister chromatids joined at the centromere. What major genetic process occurs in Pachytene? During pachytene the homologous chromosomesRead More →
Somatic cells are produced through the cell division process of mitosis. They contain two copies of each chromosome, one from an organism’s mother and one from their father. Cells with two copies of each chromosome are called diploid. Does mitosis make somatic cells or gametes? Mitosis occurs in somatic cells;Read More →
Mitotic recombination is a type of genetic recombination that may occur in somatic cells during their preparation for mitosis in both sexual and asexual organisms. … Mitotic homologous recombination occurs mainly between sister chromatids subsequent to replication (but prior to cell division). Does recombination occur in meiosis I or II?Read More →
There are two ways cell division can happen in humans and most other animals, called mitosis and meiosis. … Unlike in mitosis, the gametes produced by meiosis are not clones of the original cell, because each gamete has exactly half as many chromosomes as the original cell. Do gametes undergoRead More →
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. … The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell. DuringRead More →
Microtubules are very important in a number of cellular processes. They are involved in maintaining the structure of the cell and, together with microfilaments and intermediate filaments, they form the cytoskeleton. They also make up the internal structure of cilia and flagella. What is the function of the microtubules? Microtubules,Read More →