[Campbell Biology P.305] Homologous chromosomes are described as having the same length, cen... | Practice Question

Homologous chromosomes are described as having the same length, centromere position, and staining pattern. What is the functional significance of them carrying genes for the same inherited characters?

  • A: It ensures that both chromosomes in a pair are identical in every way.
  • B: It allows for the pairing of these chromosomes during meiosis, which is essential for their correct separation into gametes.
  • C: It prevents any genetic variation from occurring in the offspring.
  • D: It ensures that somatic cells are haploid.

Explanation

Having genes for the same characters at the same loci allows homologous chromosomes to recognize each other and pair up precisely during prophase I of meiosis. This pairing is crucial for the subsequent segregation of homologs into different daughter cells, ensuring each gamete receives one complete set of chromosomes.