The statement that best explains how Amelia was born with curly hair is she received two recessive genes. (Option II).
How was Amelia was born with curly hair?
Amelia's hair type is determined by her genotype, represented by the genes R and r.
R stands for the dominant gene for straight hair, while r represents the recessive gene for curly hair.
To have curly hair, Amelia must either have received two recessive genes (rr) or one recessive gene and one dominant gene (Rr).
The combination of two recessive genes leads to a homozygous recessive genotype, resulting in curly hair expression.
Thus, statement II, she received two recessive genes, is the more accurate explanation for Amelia having curly hair.
The complete question is below:
The Punnett square below shows the genotypes of Amelia's parents.
If R represents the dominant gene for straight hair and r represents the recessive gene for curly hair, which statement best explains how Amelia was born with curly hair?
I. She received one recessive gene
II. She received two recessive genes