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What results in the exchange of allels and produced new combinations of alleles?
Crossing-over
Which of the following creates new combinations of alleles along one chromosome?
Crossing over during meiosis creates new combinations of alleles along one chromosome. It involves the exchange of genetic material between homologous chromosomes, resulting in genetic diversity among offspring.
How can new combinations of alleles be created when genes are linked?
New combinations of alleles can be created when genes are linked through a process called crossing over during meiosis. Crossing over occurs when homologous chromosomes exchange genetic material, resulting in the mixing of alleles between the two chromosomes. This process leads to the creation of new combinations of alleles and contributes to genetic variation in the population.
What results in the exchange of alleles and produces now combinations of alleles?
Crossing over during prophase I of meiosis.
From events during what phase do novel combinations of alleles arise?
Novel combinations of alleles arise during meiosis, specifically during the phase known as crossing over in prophase I of meiosis in which homologous chromosomes exchange genetic material. This results in genetic recombination and introduces new combinations of alleles into offspring.
What is meant by 'scrambling of allelic combinations?
Recombination, or crossing over, is the exchanging of DNA between homologous chromosomes at meiosis. It results in novel combinations of alleles in the gametes, that is, it scrambles the alleles into new combinations, Let's take an example of an individual that has genes A,B and C on one chromsome, and has the alleles a and c on the other chromosome of the pair: A---B---C a---B---c If crossing over occurs between the genes A and B (and not between B and C), then we can get the following genotypes in the gametes, in addition to the above two combinations: : A---B---c a---B---C Crossing over has scrambled the allelic combinations and given us two new additional ones in the gametes. If we allow recombination between B and C, then even more combinations are possible. One can easily see how recombination can add enormous amounts of genetic variation into a population. Also, note that if no recombination occurs, only the two original combinations of alleles will make it into the gametes.
How does crossing-over affect the alleles on a chromatid?
cancer
Does sexual reproduction create new alleles or new combinations of alleles?
new combinations of alleles
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.
How has crossing over changed the combination of alleles in the new nuclei?
Crossing over results in the exchange of genetic material between homologous chromosomes during meiosis. This can create new combinations of alleles in the daughter cells, leading to increased genetic diversity. Furthermore, crossing over can result in the creation of novel gene combinations that were not present in the parental chromosomes.
How do the processes of crossing over and independent assortment compare in terms of their impact on genetic variation during meiosis?
During meiosis, crossing over and independent assortment both contribute to genetic variation. Crossing over involves the exchange of genetic material between homologous chromosomes, leading to new combinations of alleles. Independent assortment refers to the random alignment and separation of homologous chromosomes during meiosis, resulting in different combinations of alleles in the gametes. Both processes increase genetic diversity by creating unique combinations of alleles in the offspring.
What stage new allelic combinations might form?
New allelic combinations can form during meiosis, specifically in the process of genetic recombination. This is when homologous chromosomes exchange genetic material, leading to the creation of new combinations of alleles in the gametes.
