crossing over

Thân thiện

Two homologous chromosomes are crossing over during meiosis.

Definition

1. Noun:
   • The exchange of genetic material between homologous chromosomes: "crossing over" refers specifically to the biological process during meiosis where paired chromosomes swap corresponding segments, resulting in genetic recombination.

Usage

• Noun:
  • Crossing over increases genetic diversity in offspring.
  • The frequency of crossing over can be used to map gene locations on a chromosome.

Advanced Usage

• "to undergo crossing over": describes the process happening to chromosomes.
  • During prophase I, homologous chromosomes pair up and may undergo crossing over.

Variants and Related Words

• Recombination (n): a broader term for the rearrangement of genetic material, which can result from crossing over.
  • Genetic recombination is a major source of variation.
• Chiasma (n): the physical point of contact between chromatids where crossing over occurs.
  • A chiasma is visible under a microscope where crossing over has happened.

Synonyms

• Genetic recombination: the general process of which crossing over is a specific type.
• Chromosomal crossover: a more technical synonym.

Related Phrases

• Crossing over frequency: a measure of how often crossing over occurs between specific genes.
  • A low crossing over frequency suggests the genes are very close together on the chromosome.

Học thuật

Noun

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

Từ đồng nghĩa

• crossover