Why is inversion usually less harmful than deletion on a chromosome in a fertilized cell? ?

Inversion is about breaking a single chromosome into two and will eventually lead to opposite orientation while deletion is when a segment of DNA is missing.

Inversion is safer because it will only divide the chromosomes into 2, which is helpful is there’s a missing chromosome, but deletion have a larger risk since a segment of DNA will be lost leading to some defects.

the answer is

c. parental

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