Understanding Child's DNA Fingerprinting Pattern

DNA fingerprinting is a technique used to identify individuals based on their unique DNA profiles. These profiles are based on variations in repetitive DNA sequences, such as Variable Number Tandem Repeats (VNTRs).

During sexual reproduction, a child inherits genetic material equally from both biological parents. Specifically, a child receives half of their chromosomes from their mother and the other half from their father.

Since DNA fingerprinting patterns are derived from these inherited DNA sequences, the child's DNA pattern will be a combination of the parents' patterns.

• Each band or specific marker in a DNA fingerprint represents an inherited segment of DNA.
• The child inherits one allele for each marker from the mother and one allele from the father.
• Therefore, approximately 50% of the bands in the child's DNA fingerprint pattern will match bands present in the mother's DNA fingerprint, and the other 50% will match bands present in the father's DNA fingerprint.

Let's evaluate the given options based on this understanding:

• The pattern is not exactly similar to both parents because it is a mix, not a complete copy of either.
• The pattern is not 100% similar to the mother's DNA print because half comes from the father.
• The pattern is 50% bands similar to father and the rest similar to mother. This statement accurately reflects the inheritance pattern where roughly half of the genetic markers come from each parent.

Thus, the DNA fingerprinting pattern of a child is a mosaic, showing approximately 50% similarity to the father's pattern and 50% similarity to the mother's pattern.