AP BIOLOGY

Detailed explanation-1: -This shuffling process is known as recombination or “crossing over” and occurs while the chromome pairs are lined up in Metaphase I. In Metaphase I, homologous chromosome pairs line up.

Detailed explanation-2: -Crossing-over occurs during prophase I, and it is the exchange of genetic material between non-sister chromatids of homologous chromosomes. Recall during prophase I, homologous chromosomes line up in pairs, gene-for-gene down their entire length, forming a configuration with four chromatids, known as a tetrad.

Detailed explanation-3: -Crossing over occurs at step 3, which is prophase. The result is four gametes with one set of chromosomes each.

Detailed explanation-4: -Definition. Crossing over, as related to genetics and genomics, refers to the exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).

Detailed explanation-5: -Gene shuffling refers to the creation of different combinations of alleles (forms of genes) during meiosis. Gene shuffling happens in many organisms, but for simplicity, we’ll talk about this process in humans. Humans are diploid, meaning that most of our cells have two copies of each of our 23 chromosomes.