Color blindness is a recessive sex-linked human trait. If a color-blind father and a mother with normal color vision have a color-blind son, what must be the mother's genotype? A. XNXn
B. XNXN
C. XnYn
D. XNY

A. XNXn

Explanation:

looks like it's a 50% chance of color blindness

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

burning fossil fouls really decrease the carbon in the atmosphere so b