Awnser:
She has two different alleles for eye shape, one from each parent
You always receive 1 allele from each parent, and you're heterozygous, those alleles are different.
D. One sex has a higher chance to inherit it than the other (male).
These can be either recessive or dominant. We usually think more of the recessive traits like color blindness and hemophilia but dominant sex-linked traits also exist (fragile X).
This is because of B. Their cells are in direct contact with the environment.
