0
1. independent assortment of chromosomes
Chromosome can sort differently and exchange different amounts of information. It's a little complicated, but basically chromosomes can line up so that the replicates which were formed during meiosis can get multiple allele configurations. Example: Four chromosomes, two homologous pairs replicate. One from each pair has either recessive or dominant alleles. You can end up with either a recessive-recessive and dominant-dominant, or both heterozygous. The sources has a link to help understand more.
2. crossing over
This one is easy, during crossing over with gamete formation, genetic material from the mother (eggs) or father (sperm) are not all the same. You may get different combinations of traits from the father or mother. In other words, since a gamete is technically have the DNA from the father, the same half is not always taken from the father's genome.
3. random fertilization
Sperm all have different combinations of the father's DNA due to crossing over. Mix that up with the eggs from the mother which also contain different parts of her DNA, and you have a random chance that a particular sperm with particular traits is going to fertilize a particular egg with a particular trait. In other words, it's hard to get the exact same genes twice when having kids.
What else can I help you with?
How does meiosis contribute to genetic variation?
Meiosis produces gametes with different combinations of genes through crossing over and random assortment of chromosomes during meiosis I and II. This leads to genetic variation as each gamete contains a unique set of genetic information that is different from the parent cells.
How does meiosis introduce genetic variation into offspring?
1 by crossing over in prophase I , 2 by independent assoartment and 3 by mutations in s phase .1 by crossing over in prophase I , 2 by independent assoartment and 3 by mutations in s phase .Meiosis produces variation in gametes by crossing over & independent assortment also called reshuffling of genetic material . Such gametes after fertilization produce offspring with different characters .
What are the 3 sources of genetic recombination?
Genetic recombination refers to the process by which two DNA molecules exchange genetic information. The three types of genetic recombination are crossing over, conservative site-specific recombination and transpositional recombination.
Which is responsible for most genotypic and phenotypic variation among humans 1 meiosis 2 budding 3 mitosis or 4 regeneration?
Budding , mitosis and regeneration have no link with genetic variation.All variations in human being and other organisms are produced by MEIOSIS. During meiosis following important processes take place which include 1; crossing over in Prophase I ; Independent assortment of chromosomes and genes during Metaphase I , both of them result in reshufling of genes which is base of variation. Another source of variation is MUTATION.
How does meiosis produce genetic variability?
There are three sources of genetic variation in meiosis: 1) Independent assortment = like shuffling a deck of cards and dealing out half the deck 2) Crossing over = homologous chromosomes swap parts, making new combinations 3) Random fertilization = only one sperm cell makes it into the egg
How does meiosis contribute to genetic variation?
Meiosis produces gametes with different combinations of genes through crossing over and random assortment of chromosomes during meiosis I and II. This leads to genetic variation as each gamete contains a unique set of genetic information that is different from the parent cells.
How does meiosis introduce genetic variation into offspring?
1 by crossing over in prophase I , 2 by independent assoartment and 3 by mutations in s phase .1 by crossing over in prophase I , 2 by independent assoartment and 3 by mutations in s phase .Meiosis produces variation in gametes by crossing over & independent assortment also called reshuffling of genetic material . Such gametes after fertilization produce offspring with different characters .
What are the 3 sources of genetic recombination?
Genetic recombination refers to the process by which two DNA molecules exchange genetic information. The three types of genetic recombination are crossing over, conservative site-specific recombination and transpositional recombination.
Which is responsible for most genotypic and phenotypic variation among humans 1 meiosis 2 budding 3 mitosis or 4 regeneration?
Budding , mitosis and regeneration have no link with genetic variation.All variations in human being and other organisms are produced by MEIOSIS. During meiosis following important processes take place which include 1; crossing over in Prophase I ; Independent assortment of chromosomes and genes during Metaphase I , both of them result in reshufling of genes which is base of variation. Another source of variation is MUTATION.
What are the 3 sources of genetic variation?
Crossing over of sister chromatids in prophase 1 of meiosis, independent assortment along the metaphase plate in metaphase 1 of meiosis.Not sure what a third one is.-------------------------------------------------------------------There are more actually 4 causes that cause genetic variety even though mainstream high school biology only discusses the three main ones: Crossing over, independent assortment (which happen during sexual reproduction), and, random genetic mutations.The 4th one is gene transfer. Species transfer genes between them.
How does meiosis produce genetic variability?
There are three sources of genetic variation in meiosis: 1) Independent assortment = like shuffling a deck of cards and dealing out half the deck 2) Crossing over = homologous chromosomes swap parts, making new combinations 3) Random fertilization = only one sperm cell makes it into the egg
If a certain species has little genetic variation what could lead to its rapid extinction?
A lack of genetic variation can make a species less able to adapt to changing environmental conditions or new threats like diseases or predators. This reduced ability to adapt increases the species' vulnerability to extinction if they cannot effectively respond to these challenges.
What is the ultimate source of genetic variation and the basis for the diversity of life on earth?
Mutations. These have quite a few different causes. Sexual reproduction is a "more recent source" {beginning 600 million years ago} of genetic variability. The process of sharing genetic information, coupled with the random crossing and mixing of genetic information during the creation of a new organism, leads to another source of genetic variability.
How many stages of meiosis are there?
There are two stages of meiosis - meiosis I and meiosis II. Meiosis I involves chromosome crossing over and reduction division, while meiosis II involves separation of sister chromatids. Both stages are necessary to produce haploid cells with genetic variation.
What are 3 ways sexual reproduction leads to genetic diversity?
As an example, humans have 46 chromosomes, in 23 pairs. In each daughter cell of meiosis, one from each pair is given, resulting in a randomized selection from those 23 pairs. The most important way this variability is shown is that, during the chromosome duplication and division, parts of each chromosome are swapped over randomly, though only parts serving the same purpose are swapped. Finally, at the end of a single cell's meiosis, there's not two, but four daughter cells, allowing for more options per single cell undergoing meiosis.
What are three sources of genetic variability in living things?
1- reproduce 2- consume 3- die
What are the 3 examples of variation?
Three examples of variation are height differences among individuals, eye color variability within a population, and different blood types among people. These variations are the result of genetic diversity and environmental influences.
