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It would be wrong to consider mitosis insignificant as it helps in cell repair and replacement in our daily life and it would be impossible to survive without it and asexual reproduction as well but if it weren't for meiosis, none of us would have been born :) Meiosis is responsible for the division for our gamete cells which leads to the formation a zygote. from there on mitosis takes over.
Cells that divide by meiosis are diploid (2n) to start with, but the cells that are formed from meiosis are haploid (n), as the number of chromosones have halved. This therefore requires two stages: meiosis I and II.
Mitosis produces daughter cells with the same genetic material as the parent, but meiosis is the precursor to sexual reproduction - and the offspring will end up with half the genetic material of each parent.
The recombination of genetic material involved in sexual reproduction produces a much greater variety than mitosis.
Mitosis produces genetically identical copies, where as meiosis involves both the mother's X and the father's X or y chromosome combining and going through separation and segregation, so meiosis gives rise to genetically different offspring every time.
Meiosis results in genetic diversity because of the crossing over of homologous chromosomes. Because of crossing over, meiosis results in four non-identical daughter cells. Asexual reproduction produces two daughter cells that are genetically identical to the parent cell and each other.
Because meiosis results in recombination/crossing-over during gametogenesis, which does not occur in mitosis.
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During meiosis crossing-over gene exchange between chromosomes may occur Crossing-over usually results in?
The result of crossing over is genetic diversity. More specifically, it is a hybrid chromosome with a unique pattern of genetic material. Does this answer help?
How does variation occur?
Variation or mutation occurs within the DNA. It is a natural result of the replication process, or the copying of one DNA strand to make new DNA during reproduction. If the new mutation ends up making some kind of variation that does not kill the organism, then the variation will be passed on to new generations. This is how new traits are formed. When the variation is actually more useful than a trait that the organism's parents had, that new variation will be passed along as a survival trait.
When parts of chromosomes are broken off and lost during mitosis or meiosis the result is an?
when parts of chromosomes are broken off and lost during mitosis the results is a chromosomal mutation
A change in the genetic material that produces variation in a species may be the result of?
immigration, mutation and sexual reproduction.
What causes many endangered species that are now found only in zoos to have very little genetic variations?
Founder effect refers to the loss of genetic variation when a new colony is established by a very small number of individuals from a larger population. As a result of the loss of genetic variation, the new population may be distinctively different.Bottleneck effect is an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing, and the population is reduced by 50% or more, often by several orders of magnitude.Population bottlenecks increase genetic drift, as the rate of drift is inversely proportional to the population size.They also increase inbreeding due to the reduced pool of possible mates.
Why are mitosis and mitosis similar?
Because they both result in the formantion of gametes; however there is no genetic variation in meiosis.
Why meiosis 2 is similar to mitosis?
Because they both result in the formantion of gametes; however there is no genetic variation in meiosis.
Where do you expect genetic differences between cells to arise from mitosis or from meiosis?
That is a good question. In mitosis, you don't get regular genetic variation but chance mutations can occur. In meiosis with fertilization, you get pairing of DNA from different hosts on a regular basis. I would choose the latter.
Genetic variation in bacterial populations cannot result from?
Genetic variation in bacterial populations cannot result from sexual reproduction, as bacteria typically reproduce asexually by binary fission.
Why is variation not possible in mitotic division of cells?
Mitosis does not lead to the formation of chromosomes with new combination. In meiosis as a result of crossing over, chromosomes with new combinations are formed which are responsible for variation.
Which type of reproduction results in the greatest amount of genetic variation?
That would be sexual reproduction. Sexual reproduction allows for independent assortment and crossing over to occur. This is fancy language for the genetic material gets mixed up a lot. Since the genetic material gets mixed up, variation will result.
Does meiosis have variation?
Yes, meiosis results in genetic variation due to processes such as crossing over (exchange of genetic material between homologous chromosomes) and random assortment of chromosomes. These mechanisms contribute to the unique combinations of maternal and paternal genes in the resulting gametes.
Why are meiosis and mitosis similar?
Meiosis and mitosis are both processes involved in cell division. They both include stages such as prophase, metaphase, anaphase, and telophase. However, meiosis involves two divisions resulting in four genetically unique haploid cells, while mitosis involves one division resulting in two genetically identical diploid cells.
Which is responsible for most genotypic and phenotypic variation among humans 1 meiosis 2 budding 3 mitosis or 4 regeneration?
Meiosis is responsible for most genotypic and phenotypic variation among humans because it produces haploid gametes with unique combinations of parental genes through crossing over and independent assortment during prophase I.
How does mitosis and meiosis differ in the division of genetic composition?
In mitosis, the genetic composition remains the same in the parent and daughter cells, as the cells produced are genetically identical. In meiosis, the genetic composition is halved in the daughter cells, resulting in the production of gametes with half the number of chromosomes as the parent cell.
Does chiasmata occur in mitosis?
No, chiasmata do not occur in mitosis. Chiasmata are structures that form during meiosis, specifically during prophase I, as a result of crossing over between homologous chromosomes. Mitosis does not involve homologous chromosomes pairing up and exchanging genetic material like in meiosis.
What results in the most diverse offspring?
Sexual reproduction leads to variety in offspring.
