Crossing over is a process that occurs during prophase I of meiosis, which is the first division of the meiotic process. During prophase I, homologous chromosomes pair up and exchange genetic material through a process known as crossing over. This exchange results in the formation of new chromosomes that contain a mixture of genetic material from both parents.
Table 1: Phases of Meiosis
Phase | Description |
---|---|
Prophase I | Chromosomes condense and pair up, crossing over occurs |
Metaphase I | Chromosomes align at the equator of the cell |
Anaphase I | Homologous chromosomes separate and move to opposite poles of the cell |
Telophase I | Two daughter cells are formed, each with half the number of chromosomes as the parent cell |
Table 2: Benefits of Crossing Over
Benefit | Description |
---|---|
Genetic diversity | Creates new combinations of genetic material, increasing genetic diversity within a population |
Adaptation | Allows populations to adapt to changing environmental conditions by providing new genetic variations |
Evolution | Drives the evolution of new species by creating new genetic combinations that can be selected for or against |
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