When land is cleared for agriculture or home construction, small isolated sections of the original habitat may remain. Explain how this reduction in habitat size and the isolation of small sections of habitat might lead to species endangerment.

Species get endangered by the process of habitat fragmentation.

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)