This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I. Homologous chromosomes – 1 inherited from each parent – pair along their lengths, gene by gene. ... The chromosomes now have genes in a unique combination
Answer:
CROSSING OVER is the exchange of segemetics of dna or genetic matierial between the members of the pairs of cromezones
The answer is A (the sun)
Both parents must be carriers, which means they have the heterozygous gene (one uppercase letter & one lower case letter). They will still carry that mutated gene (because they have a lower case letter), and their offspring will have a 25% chance of getting a recessive disorder. The percentage is low but still possible.