Which of the following best describes the surface of Earth?

Most of the Earth surface, about 70%, is covered with water. Underneath the water that fills the oceans, and the dirt and plants that cover the continents, the Earth's surface layer is made of rock. ... This outer layer formed a hard, rocky crust as lava cooled about 4.5 billion years ago.

Explanation:

mendel's first law states that during the formation of reproductive cells , pairs of hereditary factors for a specific trait separate so that offspring receive one factor from each parent.

explanation:

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)