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In meiosis crossing over may occur at certain points on a chromatid. Crossing over is where variation occurs in allele combination. When a Zygote is formed alleles from mother and father cross over.. this is why you may have some features resembling your father and your mother... or grandma or grandpa... etc...
There can be mutations ( messups ) in mitosis but the actual process results in no genetic variation.
AP bio
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What leads to genetic variation in a population?
Random mutations in an organism's DNA after reproduction.what lead to variations
What causes genetic variation in a species?
genetic variation happens because of meiosis. chromosomes are randomly in each sperm/egg cell, and so when they come together it's unlikely to get the same combination twice
Where is genetic information in the nucleus stored?
Genetic information is stored in the chromosomes.
How do mutation and crossing over cause genetic variation?
In meiosis I, segregation of chromosomes...that is, separating off into pairs, allows for crossing over to occur. Crossing over is one mechanism responsible for gene recombination to occur, and genetic recombination is one way that variations in traits increase.
Which is responsible for genetic variation mitosis or meiosis?
Meiosis is responsible for genetic variation
What is the basis of alignment in meiosis 1 and meiosis 2?
The basis of alignment in meiosis I is the pairing of homologous chromosomes, where they line up side by side to form tetrads. This allows for genetic recombination to occur between the homologous chromosomes. In meiosis II, alignment is based on the alignment of sister chromatids to ensure that each daughter cell receives one copy of each chromosome.
How does meisosis introduce variations in traits?
Meiosis introduces variations in traits through two main processes: crossing over and independent assortment. Crossing over is the exchange of genetic material between homologous chromosomes, resulting in new combinations of alleles. Independent assortment involves the random alignment of maternal and paternal chromosomes during meiosis I, leading to the shuffling of genetic material and creating different combinations of traits in offspring.
Random alignment of chromosomes contribute to genetic variation?
Random alignment of chromosomes occurs during Metaphase I in a cells meiosis. Random alignment is when the homologous pairs of chromosomes line up at the equator or middle of the cell, and are arranged by which member faces what pole. This allows equal opportunity for the chromosomes to migrate to a different cell.
Which stage of meiosis do homologous chromosomes line up in the center of the cell?
Homologous chromosomes line up in the center of the cell during metaphase I of meiosis. This alignment allows for crossover events to occur between the homologous chromosomes, promoting genetic diversity.
What is the relationship between independent assortment and meiosis?
Meiosis 1 is the process of separating chromosomes (independent assortment). Independent assortment is the random assortment of chromosomes. So without meiosis, there would be no way to separate the chromosomes randomly. Hope that helps(:
While examining a cell in prophase 1 of meiosis you observe a pair of homologous pairing tightly what is the significance of the places at which the chromosomes are joined?
The places at which the chromosomes are joined are called chiasmata, and they represent the exchange of genetic material between homologous chromosomes. This process, called genetic recombination or crossing over, increases genetic diversity by shuffling alleles between chromosomes. Chiasmata also help to ensure proper alignment and segregation of chromosomes during meiosis.
What is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.?
What is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.?
Why do gametes have different combinations of alleles?
Gametes have different combinations of alleles due to the process of meiosis, which involves genetic recombination. During meiosis, homologous chromosomes exchange genetic material, leading to new combinations of alleles in gametes. This increases genetic diversity in offspring.
What is the reshuffling of chromosomes during meiosis?
genetic recombination
What is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis?
Crossing over, or genetic recombination, is the process in meiosis where sections of chromosomes are exchanged between homologous chromosomes, leading to genetic variation in offspring. This event occurs during prophase I of meiosis.
Chromosomes exchange genetic information through the process of what?
Chromosomes exchange genetic information through the process of genetic recombination, specifically during meiosis. This process involves the exchange of genetic material between homologous chromosomes, resulting in genetic variation among offspring.
When Homologous chromosomes swap genetic information as part of meiosis?
Prophase I is the phase of meiosis.
