crossing over

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Explanation of "Crossing Over"

Definition: "Crossing over" is a term used in biology, specifically during the process of meiosis, which is how cells divide to form eggs and sperm. It refers to the process where sections of DNA are exchanged between two homologous chromosomes (the paired chromosomes that have the same genes but may have different versions). This exchange helps create genetic diversity in offspring.

Advanced Usage:

In more advanced discussions, "crossing over" can be explored in the context of genetic mapping and evolutionary biology, where scientists study how these genetic exchanges can affect populations over generations.

Word Variants:

• The term "crossing over" does not have direct variants, but you might encounter related terms such as:
  • Meiosis: The type of cell division where crossing over occurs.
  • Homologous chromosomes: The paired chromosomes that undergo crossing over.

Different Meanings:

While "crossing over" primarily has a scientific meaning, it can also be used metaphorically in other contexts: - In everyday language, it can refer to making a transition from one state to another (e.g., "crossing over" from childhood to adulthood).

Synonyms:

In a biological context, there aren't direct synonyms for "crossing over," but you might hear related phrases like: - Genetic recombination: A broader term that includes crossing over as one of the mechanisms.

Idioms and Phrasal Verbs:

• Cross over (as a phrasal verb): In a more general sense, it can mean to switch sides or to change one's beliefs or affiliations. For example, "He decided to cross over to the other party after the election."

Conclusion:

Understanding "crossing over" is important in genetics as it highlights how diversity is created in living organisms.

Academic

Noun

1. the interchange of sections between pairing homologous chromosomes during the prophase of meiosis

Synonyms

• crossover