To note: all three are blond, ellie's eyes are brown, her brothers are blue.

Ellie's father is homozygous for eye colour but her mother is heterozygous. She passed a 'blue eye' gene to the boys and a 'brown eye' gene to Ellie. Brown hair is dominant over blond but ellie and her brothers are all blond.
By reading that what could the answer to this question be. I would like some help not the answer thanks.

Why are ellie and her 2 brothers so different even though their genes came from the same parents

Based on the information provided, Ellie and her two brothers have different physical characteristics despite coming from the same parents. The key factors that contribute to these differences are hair color and eye color.

Firstly, it is mentioned that brown hair is dominant over blond hair. However, Ellie and her brothers all have blond hair. This suggests that both of their parents must either have the recessive blond hair allele or be carriers of it. To further understand the inheritance of hair color, it would be helpful to determine the hair color of Ellie's parents and any previous generations.

Secondly, Ellie's father is mentioned to be homozygous for eye color, meaning he has two identical alleles for eye color. However, Ellie's mother is heterozygous, which means she has two different alleles for eye color. Given this information, Ellie's brothers inherited the blue eye allele from the mother, resulting in blue eyes. Meanwhile, since Ellie received the brown eye allele from her mother, she has brown eyes, which differ from her brothers.

Overall, the variations in hair color and eye color in Ellie and her brothers can be attributed to the combination of alleles inherited from their parents. Understanding the specific alleles that their parents carry for these traits would provide a more accurate explanation.

Based on the information provided, it seems that Ellie's mother is heterozygous for eye color, meaning she carries both a dominant and a recessive gene for eye color. Ellie's father, on the other hand, is homozygous, meaning he carries two copies of the same gene for eye color.

When it comes to eye color, the dominant gene for blue eyes is passes from Ellie's mother to her two brothers, while the recessive gene for brown eyes is passed to Ellie. This explains why her brothers have blue eyes and Ellie has brown eyes.

As for their hair color, brown hair is dominant over blond hair, yet all three siblings have blond hair. This suggests that both parents are carriers of the recessive blond hair gene. This would mean that both Ellie's mother and father carry the gene for blond hair, which is inherited by Ellie and her brothers, resulting in their blond hair despite the dominant brown hair gene.

Overall, the differences in eye and hair color among Ellie and her two brothers can be attributed to the inheritance of different combinations of genes from their parents.