Which processes lead to most genetic variation in sexually reproducing organisms?

Question

What processes contribute most significantly to genetic variation in sexually reproducing organisms?

Anonymous · Accepted Answer

The processes that lead to most genetic variation in sexually reproducing organisms are as follows;- cross over- independent orientation of chromosomes in meiosis- random fertilizationThe behavior of chromosomes during fertilization and meiosis is what brings most of the variation that arises each generation during sexual reproduction.

Candido Schoen · Answer

The correct answer is crossing over.Explanation:Genetic variation in organisms is the basis of diversity of organisms on this planet.This genetic variation in organisms happens during the time of gamete formation in meiosis where the exchange of chromosome takes place in pachytene stage of prophase I. This exchange of segment is called recombination which produces a unique combination of the allele. Thus, crossing over is the correct option.

Mr. Donnie Lesch · Answer

The processes that lead to most genetic variation insexually reproducing organisms are the following;-         Crossing over – the process of exchanging geneticmaterial that occurs during sexual reproduction-         Independent assortment of chromosomes in meiosis– the process where maternal chromosomes are not separated in a cell with theparental chromosomes separated-         Random fertilization – responsible for the spermand the egg to meet

Miss Meaghan Dooley · Answer

The tree processes that increase the genetic variation in sexually reproducing organisms are : random fertilization, the independent orientation of chromosomes in meiosis and the crossing over.When using the term random fertilization biologists mean that there is no preference in choosing a reproductive mate, and that all of the individuals have the same chance to reproduce. This increases the genetic variability because it allows individuals with genetic differences to reproduce and leave offspring with their combined genetic traits.The independent orientation of chromosomes in meiosis and the process of meiosis in general enable the existence of genetic differences between two generations ( parents and offspring generation). Due to meiosis the offspring is not an identical clone of the parent.The crossing over is maybe the important process for increasing the genetic variation in sexual reproduction. During the process of meiosis two chromosomes in a chromosome pair that have the same genes (but sometimes different alleles of the same gene) can exchange parts of their DNA sequence. This process, called the crossing-over results in genetic differences in the chromosomes that are later passed to the offspring. In other words, the chromosomes inherited are ''mixed'' or changed a little bit, therefore different than the ''original'' ones that the parents had.

Anonymous · Answer

Crossing over, independent orientations (assortment) of chromosomes, random fertilization contribute the process of genetic variation. Crossing over leads to exchange of genetic information in between the sister chromatids. The process of independent assortment, during metaphase 1, is responsible for the unique arrangement of the chromosomes, and have 2n possibilities. Random fertilization is the cause of the selection of a particular sperm that fuses with the egg and leads to the formation of the embryo, and a typical genetic characteristic is shared between the two.

Anonymous · Answer

Crossing over, random fertilization, independent orientation of chromosomes in meiosis.

Anonymous · Answer

The answers are crossing over, independent assortment of chromosomes in meiosis and random fertilisation. Crossing over, especially, causes genetic recombination and results to traits that are different from either parents. Another process that leads to genetic variations is genetic mutations.

Anonymous · Answer

Various sources can lead to genetic variability among sexually reproducing organs. The one known for most genetic variability is called homologous recombination. This happens in meiosis when homologous chromosomes cross and exchange genetic material. Other processes are immigration, emigration, translocation, and polypoidy.

Miss Sarai Sanford

Which processes lead to most genetic variation in sexually reproducing organisms?

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