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Does sexual reproduction require meiosis?
The process of meiosis results in the production of gametes in which the number of chromosomes is reduced by half. During sygamy, two gametes fuse to form a new cell, and the number of chromosomes is restored to the full amount. Therefore, by coupling meiosis and syngamy, the organism ensures that the proper number of chromosomes will be maintained.
Is homologous chromosomes only present in cells that undergo meiosis?
Usually they dont as homologous chromosomes form bivalents with other homologous chromosomes and crossing over occurs between the 2. But if a chiasmata does form between the t homologous chromosomes they can change information.
What happens to the remaining chromosomes from the last division in meiosis?
In meiosis all the chromosomes are incorporated into sperm cells whereas production of an unfertilized egg results in the leftover chromosomes incorporated into polar bodies.
How many haploid daughter nuclei are produced by meiosis?
Four polar bodies, though not all become gametes. In males all become sperm, but in females only one becomes an egg.
What has all the genetic instructions to produce a living organism?
The genetic instructions are known as DNA and are found in chromosomes, which are basically the filing cabinets of your body.
What is the fundamental cycle that allow all animals to reproduce sexually?
The fundamental cycle that allows all animals to reproduce sexually is called meiosis. Meiosis is a type of cell division that produces gametes (sperm and egg cells) with half the number of chromosomes as the parent cell. When these gametes combine during fertilization, they create a new organism with a full set of chromosomes, allowing for genetic diversity and the continuation of the species.
If the egg cell of a giraffe has 31 chromosomes how many chromosomes will a giraffes heart cell have?
A giraffe's somatic cells, such as heart cells, will also have 31 chromosomes. This is because all cells in an organism's body carry the same set of chromosomes, with the exception of sex cells (gametes) which undergo meiosis to reduce their chromosome number by half.
How is meiosis related to genetics?
Meiosis is the process of cell division in germ line cells to form gametes. This process furthers sexual reproduction because each gamete has half the number of chromosomes of normal cells, so that when two gametes (one from each parent) combine, the correct number of chromosomes is preserved in the resulting zygote organism. This process is unlike mitosis, where the cells are simply replicated, preserving the number chromosomes
What are all paired chromosomes that are similar within an organism called, including autosomes?
The paired chromosomes that are similar within an organism, including autosomes, are called homologous chromosomes.
Meiosis is important because it allows a mixing of the gene pool or?
Meiosis insures the correct number of chromosomes. Without all 46 chromosomes, illnesses such as trisomy 13 and huntington's disease occur.
What would happen if meiosis doesn't occur in sexual reproduction?
Meiosis is the most important biological process in all advanced plants and animals. If this process did not occur, the production of the sex cells would not occur. This is also referred to as a type of chromosome reduction division. Hence, that is how the sexual cells (gametes) have only half the number of chromosomes as the other body cells of that organism. So if meiosis didn't occur, sexual reproduction could not occur.
For what reasons might a cell use meiosis?
All human cells have 46 chromosomes, 23 pairs. In sexual reproduction, if an egg and a sperm each with 46 chromosomes joined then the zygote would have 92 chromosomes. To keep this from happening, cells undergo meiosis. In meiosis the cells replicate the chromosomes and divide then divide again so they end up with only 23 chromosomes. Cells with half the number of chromosomes are called gametes.
