I need help solving genetics problems. Please help! I am very lost

1.) Two black female mice (X and Y) are crossed with the same brow male. In a number of litters, female X produced 9 black mice and 7 brown mice. Female Y produced 14 black mice. What is the mechanism of inheritance of the black and brown coat color in mice? What are the genotypes of all of the parents?

2.)  In humans, two abnormal conditions (cataracts in the eyes and excessive fragility in the bones) seem to depend on separate dominate genes located on different chromosomes. A man with cataracts and normal bones, whose father had normal eyes, married a woman free from cataracts but with fragile bones. Her father had normal bones. What is the probability that a.) their first child will be free from both "abnormalities"? b.) have cataracts but no fragile bones? c.) have fragile bones but not cataracts? and d.) have both cataracts and fragile bones?