Question

a gene mutation occurs on a section of chromosome 1 during prophase i. due to the physical exchange of genetic segments between homologous chromosomes, the mutation is transferred to the other homologous chromosome. this mechanism is defined as: independent assortment crossing over asexual reproduction fertilization in prophase i of meiosis, homologous pairs aligning at the center of the cell. the random orientation of these pairs leads to millions of unique chromosome combinations in the gametes. this process is the key source of genetic variation is called: cytokinesis non - disjunction independent assortment crossing over

Explanation:

1. Crossing over is the physical exchange of genetic segments between homologous chromosomes during Prophase I of meiosis. This is exactly what is described in the first question.
2. Independent assortment refers to the random orientation of homologous chromosome pairs at the metaphase plate during Prophase I of meiosis, which leads to a large number of unique chromosome combinations in gametes. This matches the description in the second question.

Answer:

1. B. Crossing over
2. C. Independent assortment