Question

independent assortment is a process where the alignment of homologous chromosomes during meiosis i is random. this process contributes to genetic variation, as gamete formation results in unique combinations of genetics. which diagram best shows crossing - over? (diagrams labeled a, b, c, d are present, with a showing a circular diagram, b showing a diagram related to transcription/translation, c showing chromosomes with crossing - over - like structures, d showing a cell division process)

Explanation:

Step1: Recall crossing-over definition

Crossing-over is the exchange of genetic material between homologous chromosomes during meiosis.

Step2: Analyze each diagram

• A: Shows circular structures (not chromosomes exchanging material).
• B: Shows non-homologous structures (unrelated to crossing-over).
• C: Shows two homologous chromosomes pairing, exchanging segments, then separating—matches crossing-over.
• D: Shows cell division (not chromosome exchange).

Answer:

C. The diagram showing homologous chromosomes exchanging segments