Question

kai looks at a photo of herself with her parents. she notices that, while her features are similar to her parents features, they do not appear to be identical.

which explains why this is the case?

• their dna is made of different codon sequences.
• their dna is made of four different bases.
• kai inherited more proteins from one parent than the other.
• kai inherited different amino acids from either of her parents.

Explanation:

1. Analyze Option 1: DNA has codon sequences (triplets of nucleotides) that code for amino acids. Different individuals (even related) have different codon sequences in their DNA, leading to similar but not identical features due to genetic variation (like meiosis and fertilization mixing genes).
2. Analyze Option 2: All human DNA has the same four bases (A, T, C, G), so this doesn’t explain differences.
3. Analyze Option 3: Proteins aren’t inherited directly; genes (DNA) are inherited, which then code for proteins. So this is incorrect.
4. Analyze Option 4: Amino acids are the building blocks of proteins, but they aren’t inherited directly. Genes determine how amino acids are assembled, so this is incorrect.

Only the first option explains the genetic basis for similar but non - identical features.

Answer:

A. Their DNA is made of different codon sequences.