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How does crossing-over affect the alleles on a chromatid?
cancer
What is the site of crossing over between two non-sister chromatids?
The site of crossing over between two non-sister chromatids is called the chiasma. It is a physical point where genetic material is exchanged during meiosis. This exchange leads to genetic recombination and increased genetic diversity among offspring.
Why do you use non-sister chromatids to demonstrate crossing over?
Crossing over occurs between homologous chromosomes, which are not identical, as one member of each pair of homologous chromosomes comes from the mother, and one member comes from the father. Sister chromatids are identical and crossing over would have no effect.
How do sister chromatids of a pair of homologous chromosomes form tetrads and undergo crossing-over during meiosis?
During meiosis, sister chromatids of homologous chromosomes come together to form a structure called a tetrad. This allows for crossing-over to occur, where sections of genetic material are exchanged between the chromatids. This process increases genetic diversity in the resulting gametes.
What is a process in which homologous chromosomes exchange portions of their chromatids during meiosis?
The process is called crossing over or genetic recombination. It results in genetic diversity by shuffling genetic information between homologous chromosomes, leading to unique combinations of genes in the offspring.
How does crossing-over affect the alleles on a chromatid?
cancer
What is the site of crossing over between two non-sister chromatids?
The site of crossing over between two non-sister chromatids is called the chiasma. It is a physical point where genetic material is exchanged during meiosis. This exchange leads to genetic recombination and increased genetic diversity among offspring.
Why do you use non-sister chromatids to demonstrate crossing over?
Crossing over occurs between homologous chromosomes, which are not identical, as one member of each pair of homologous chromosomes comes from the mother, and one member comes from the father. Sister chromatids are identical and crossing over would have no effect.
How do sister chromatids of a pair of homologous chromosomes form tetrads and undergo crossing-over during meiosis?
During meiosis, sister chromatids of homologous chromosomes come together to form a structure called a tetrad. This allows for crossing-over to occur, where sections of genetic material are exchanged between the chromatids. This process increases genetic diversity in the resulting gametes.
How does crossing over during meiosis contribute to genetic diversity?
Crossing over during meiosis is a process where genetic material is exchanged between homologous chromosomes. This creates new combinations of genes, leading to genetic diversity in offspring.
What is a process in which homologous chromosomes exchange portions of their chromatids during meiosis?
The process is called crossing over or genetic recombination. It results in genetic diversity by shuffling genetic information between homologous chromosomes, leading to unique combinations of genes in the offspring.
How does the process of crossing over in mitosis contribute to genetic diversity in offspring?
During crossing over in mitosis, genetic material is exchanged between homologous chromosomes. This process creates new combinations of genes, leading to genetic diversity in offspring.
When corresponding portions of chromatids on two homologous chromosomes change places what has occured?
This is called genetic recombination or crossing over. It results in the exchange of genetic material between homologous chromosomes during meiosis, leading to genetic diversity in offspring.
Why is it pointless for sister chromatids to crossover?
Crossing-over occurs between non-sister chromatids, since (prior to crossing-over) sister chromatids are genetically identical (i.e. one is a duplication of the other). Therefore, if sister chromatids underwent a cross-over, no genetic variation would occur.
The exchange of genetic material between chromatids is called?
Crossing over is the exchange of genetic material between chromatids. This is also known as synapsis, and it occurs during prophase one of meiosis.
Crossing over involves the exchange of genetic information between what?
Non sister chromatids
How does the process of crossing over during mitosis contribute to genetic diversity?
During the process of crossing over in mitosis, genetic material is exchanged between homologous chromosomes. This exchange results in new combinations of genes being passed on to offspring, increasing genetic diversity.
