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Multiple Choice
What process involves a physical exchange of DNA segments between homologous chromosomes?
A
Segregation
B
Crossing over
C
Replication
D
Independent assortment
Verified step by step guidance
1
Understand the context: The question is about a process that involves the exchange of DNA segments between homologous chromosomes.
Identify the key terms: 'homologous chromosomes' are pairs of chromosomes that have the same structure and gene sequence, one inherited from each parent.
Define 'crossing over': This is a process during meiosis where homologous chromosomes exchange segments of DNA, leading to genetic variation in gametes.
Differentiate from other terms: 'Segregation' refers to the separation of alleles during gamete formation, 'Replication' is the process of copying DNA, and 'Independent assortment' is the random distribution of homologous chromosomes during meiosis.
Conclude that 'crossing over' is the correct process that involves the physical exchange of DNA segments between homologous chromosomes.