How does Angiogenesis lead to cancer cells?

The angiogenesis are formation of new blood vessels. The formation of new blood vessels supply the cancer cells oxygen and nutrients which is stimulated by the chemical signals sent by the tumor allowing the tumor to enlarge and they continue to invade nearby body tissues spreading to the whole body forming new colonies of cancer cells.

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)

a. to encourage apoptosis