Question

genetic review
which of these is the most likely result of the process shown in the diagram?
chromosome replication will cease to avoid errors that result in mutations.
offspring will no longer express traits from previous generations.
gametes will contain new allele combinations.
chromatids will have less genetic variety.

Explanation:

Step1: Identify the process in the diagram

The diagram shows crossing - over (exchange of genetic material between homologous chromosomes).

Step2: Analyze each option

• Chromosome replication is a separate process and not directly affected by crossing - over in the way described in the first option.
• Offspring still inherit traits from previous generations, so the second option is incorrect.
• During crossing - over, genetic material is exchanged between homologous chromosomes. This leads to new allele combinations in gametes.
• Chromatids actually gain genetic variety due to crossing - over, so the fourth option is wrong.

Answer:

Gametes will contain new allele combinations.