Question

which of the following correctly describes the process being illustrated?
a. mutation in which the dna content of the gene is altered
b. segregation of sister chromatids
c. condensation and segregation of alleles
d. crossing-over in which alleles are exchanged

1. what is the question asking? which of the following answers correctly describes the process that is shown in the picture

what is the correct answer? d
why are the other answers incorrect?

Explanation:

• Option A: Mutation alters DNA sequence, but the image shows chromosome segment exchange, not DNA content alteration of a gene. So A is incorrect.
• Option B: Segregation of sister chromatids involves separating identical chromatids, but the image shows exchange between non - sister chromatids (homologous chromosomes), so B is incorrect.
• Option C: The process shown is not about condensation and segregation of alleles. It's about exchange between chromosomes, so C is incorrect.
• Option D: The image shows crossing - over, where alleles are exchanged between homologous chromosomes (non - sister chromatids), which matches the description of crossing - over.

Answer:

D. crossing - over in which alleles are exchanged