0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Why is fertilization dependenton meiosis?
Meiosis makes each new cell genetically unique in terms of DNA. This ensures that the offspring of the organism is also genetically unique as the two gametes (sex cells) combine together to give the cell a full set of chromosomes that the cell needs to divide/multiply into a new life.
Are offspring of gametes haploid or diploid?
Gametes are haploid. When two gametes unite during fertilization, they form a diploid zygote, genetically unique from either parent, and the first cell of the offspring. The zygote is not really considered an offspring of the gametes, but of the parent organisms that produced the gametes. For example, a human zygote is the first cell of a human baby formed when a sperm from a male and an ovum from a female unite during fertilization. The zygote and subsequent baby are the offspring of the mother and father.
What is the function of the cells made from meiosis?
The product of meiosis are sex cells or gametes 1N, Eggs, Sperm and pollen. Because of meiosis, and crossing over, these cells are genetically unique. Consequently, the union of these sex cells (egg and sperm) form new and different combinations and therefore allow for variation and change within a species.
When scientists use cells to produce an identical creature it is known as what?
Mitosis is the process whereby a cell replicates its DNA and divides into two identical daughter cells. Meiosis produces genetically unique haploid sex cells.
What is the two events unique to meiosis and describe?
Meiosis is a special type of cellular division because it results in cells which have half the number of chromosomes as the original cell. Meiosis produces 4 gametes (sex-cells) from one original cell. These gametes are involved in sexual reproduction.
Does meiosis make haploid or diploid cell?
Meiosis makes 4 genetically unique haploid cells. Mitosis makes 2 diploid cells.
Why is fertilization dependenton meiosis?
Meiosis makes each new cell genetically unique in terms of DNA. This ensures that the offspring of the organism is also genetically unique as the two gametes (sex cells) combine together to give the cell a full set of chromosomes that the cell needs to divide/multiply into a new life.
What phases of meiosis results in the formation of four unique cells?
Through meiosis, four haploid cells/gametes are made. Haploid cells/gametes are sperm and eggs. In humans, they each have 23 chromosomes so that when they unite, a zygote is formed. Also know that the cells after that are known as diploids because they have 46 chromosomes in each cell.
Are offspring of gametes haploid or diploid?
Gametes are haploid. When two gametes unite during fertilization, they form a diploid zygote, genetically unique from either parent, and the first cell of the offspring. The zygote is not really considered an offspring of the gametes, but of the parent organisms that produced the gametes. For example, a human zygote is the first cell of a human baby formed when a sperm from a male and an ovum from a female unite during fertilization. The zygote and subsequent baby are the offspring of the mother and father.
How many nuclei are present when meiosis 2 is complete?
After meiosis II there will be four cells, each with its own genetically unique haploid nucleus. In females, only one of the four cells becomes a gamete (ovum). The ovum receives the majority of cytoplasm during cytokinesis, and is much larger than the other cells. In males, all four cells will become gametes (sperm cells).
What is the type of cell division that results in genetically unique individuals?
Meiosis
Principle of independent assortment?
Independent assortment is the random assortment of chromosomes during the production of gametes. This results in genetically unique gametes. The gametes are genetically different to the one another. This leads to genetic variation.
What is the function of the cells made from meiosis?
The product of meiosis are sex cells or gametes 1N, Eggs, Sperm and pollen. Because of meiosis, and crossing over, these cells are genetically unique. Consequently, the union of these sex cells (egg and sperm) form new and different combinations and therefore allow for variation and change within a species.
Which type of reproduction involves meiosis and creates offspring that are genetically unique?
Sexual reproduction.
What would happen if gametes were not haploid?
"Gametes result from meiosis so your question doesn't make sense."Not necessarily a question that doesn't make sense. My biology professors says that, "Meiosis halves the amount of information present in each cell, from the diploid (or double) complement of information to the haploid (or single) complement of information. Fertilization will later restore the ordinary diploid information content by combining the unique informational contents of the egg and the sperm." If that meiosis steps don't happen, then fertilization doesn't happen properly. Meiosis occurs in immature reproductive cells of sexually reproducing eukaryotes. It halves the diploid (2n) chromosome number, to the haploid number (n) for forthcoming gametes. The two gametes fuse at fertilization and the chromosome number is restored, giving the new individual two sets of chromosomes, one from each parent.
What are the end results of mitosis and meiosis?
1) Mitosis occurs in body cells and produces two diploid (2n) daughter cells that are genetically identical for growth and repair. Meiosis occurs in the gonads and produces four haploid (n) daughter cells that are genetically unique for reproduction. 2) Meiosis requires two cycles to halve the chromosome number.. The first cell division of meiosis called meiosis I is similar to mitosis.. The second cell division halves the chromosome number from 2n to n.. This is required to produce gametes (cells with n number of chromosomes - sperm or ova) so that when the gametes join together during fertilization they produce a zygote that is 2n. 3) Crossing over during meiosis increases the genetic variation of the gametes and thus the next generation.. Crossing over occurs in prophase I of meiosis when homologous chromosomes pair up in tetrads and non-sister chromatids swap pieces of DNA.. This creates unique chromosomes.. Variation is also increased by the independent assortment of chromosomes during meiosis (a gamete can receive the paternal chromosome or maternal chromosome for each chromosome) and random fertilization (any sperm can fertilize any egg).. (Sources: Yahoo!)
What 3 ways does sexual reproduction increase genetic varation?
The Crossing over during meiosis I between non-sister chromatids. The random orientations and separations of homologous chromosomes and sister chromatids during metaphase I, anaphase I and metaphase II, anaphase II. The random fusion of male and female gametes.
