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Homologous chromosomes cross over to start genetic differences. If this didn't happen, then the cells would be too similar to each other. (｡-_-｡) that is all
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∙ 12y ago
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Could crossing over occur during second meiotic division?
No, tips of homologous chromosomes cross over in Meiosis I. There are no homologous chromosomes by Meiosis I.
What are the chromosomes that carry the same sets of genes?
Homologous Chromosomes.- for fact.
What is homologous chromosomes frequently exchange portions of their DNA called?
It's called crossing over, and it generally only happens between homologous chromosomes.
A sentence that uses homologous chromosomes?
Chromosomes have the same sequence as a homologous.
What action occurs during meiosis exchanging pieces of chromosomes between homologous chromosomes?
crossing over
Could crossing over occur during second meiotic division?
No, tips of homologous chromosomes cross over in Meiosis I. There are no homologous chromosomes by Meiosis I.
What exchange of genetic material between arms of homologous chromosomes?
When chromosomes cross over. (Chromal Crossover, I believe)
What is the exchange of genes between homologous pairs of chromosomes?
homologous chromosomes exchange alleles during crossing over.
What is the prophase 1?
Prophase I is the stage in meiosis in which homologous chromosomes pair up. During this time, chromatids from the homologous pairs cross over and exchange segments with one another.
What best describes chromosomes that contain genes for the same characteristics?
Chromosomes that have the same sequence of genes are called homologous chromosomes.
Humans are a diploid species what does this say about their chromosomes?
They have homologous chromosomes
What are the chromosomes that carry the same sets of genes?
Homologous Chromosomes.- for fact.
How do you cross over?
Crossing over, which occurs during prophase I of meiosis when the homologous pairs of chromosomes pair up, results in the non-sister chromatids of the homologous pairs of chromosomes exchanging pieces of chromosomes (DNA), so that each chromatid will have a combination of the mother's and the father's chromosomes. This results in genetic recombination and increases genetic diversity.
What is unique to mitosis and not a part of meiosis?
homologous chromosomes behave independently Pairing of homologous chromosomes allowing independent segregation and crossing over is unique to meiosis. In mitosis, homologous chromosomes behave independently.
What phase of meiosis do homologous chromosomes cross over?
Crossing over begins early in prophase I of meiosis. At the time, homologous chromosomes Are paired along their lengths. Each gene on one homologue ia alined precisely with the corresponding gene on the other homologue. Source: my science book copy right 2006
What happens in meiosis during phase 1?
The homologous pairs of chromosomes line up together forming tetrads. During this time, chromatids from the homologous chromosomes cross over and exchange segments so that each chromatid contains both maternal and paternal DNA.
What stage in meiosis do homologous chromosomes come together?
During meiosis, the homologous chromosomes come together during prophase I. Pairs of homologous chromosomes align during a process called synapsis and form a tetrad (four sister chromatids, two from each pair of homologous chromosomes). During synapsis, crossing over may occur, during which homologous chromosomes exchange genetic material.
