Which of the following processes occurs when homologous chromosomes cross over in meiosis?
Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA.
Which of the following processes occurs when homologous chromosomes cross over in meiosis I quizlet?
Which of the following processes occurs when homologous chromosomes cross over in meiosis I? Corresponding segments of non-sister chromatids are exchanged.
When homologous chromosomes crossover What is the result?
Crossing over is a process that happens between homologous chromosomes in order to increase genetic diversity. During crossing over, part of one chromosome is exchanged with another. The result is a hybrid chromosome with a unique pattern of genetic material.
What is the result of crossing over during meiosis?
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. … It results in gametes that have unique combinations of chromosomes.
During Which of the following processes crossing over of chromosomes normally takes place?
Crossing over of chromosomes takes place in meiosis II. C) Meiosis II occurs in a haploid cell, while mitosis occurs in diploid cells. D) Sister chromatids separate in mitosis, and homologous chromosomes separate in meiosis II.
What happens in metaphase I?
At metaphase I, the homologous chromosomes move to the center of the cell and orient themselves along an equatorial plane, forming the so-called metaphase plate. … The spindle fibers attach to the kinetochores of the centromere, preparing the chromosomal pair to be separated during the next phase, anaphase I.
Which of the following might result in a human zygote with 45 chromosomes?
Which of the following might result in a human zygote with 45 chromosome? An error in either egg or sperm meiotic anaphase.
Which of the following characteristics do homologous chromosomes exhibit which of the following characteristics do homologous chromosomes exhibit?
Which of the following characteristics do homologous chromosomes exhibit? They carry information for the same characters. Homologous chromosomes contain the same gene loci but may have different alleles of a particular gene. Sister chromatids are identical copies of each other produced during DNA replication.
In which of the following processes do homologous chromosomes split?
In anaphase I, centromeres break down and homologous chromosomes separate. In telophase I, chromosomes move to opposite poles; during cytokinesis the cell separates into two haploid cells.
What happens during crossover Brainly?
Crossing over is a basic concept of genetics and cell biology, often called recombination. It occurs during meiosis. Crossing over is the exchange of chromosome segments between non-sister chromatids during the production of gametes.
What happens in crossover?
Crossover occurs when two chromosomes, normally two homologous instances of the same chromosome, break and then reconnect but to the different end piece. If they break at the same place or locus in the sequence of base pairs, the result is an exchange of genes, called genetic recombination.
Why is crossover important in meiosis?
Crossing over is essential for the normal segregation of chromosomes during meiosis. Crossing over also accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical.
What happens in crossing over quizlet?
phenomenon that occurs in Prophase I of meiosis between 2 sister chromatids on different chromosomes of an Homologous pair. The 2 sister chromatids intersect and exchange some of their genetic material.
What is the outcome of crossing over quizlet?
the chromatids separate and move apart to opposite ends of the cell. Telophase II. Results in 4 haploid cells (4 eggs or 4 sperms) crossing over. occurs when the 2 chromosomes pair up and form a tetrad; they may exchange portions of the chromosomes leading to exchange in alleles.
What is the most common result of crossing over?
Crossing over produces new combinations of alleles within a chromosome—combinations that did not exist in either parent. This phenomenon is known as recombination. Failure of the zygote to develop into an embryo is the most common result of gamete trisomy.