If a boy exhibits a sex-linked trait that is carried on the X-chromosome, what must be true? a) his mother exhibited that trait
b) his father exhibited that trait
c) his father’s mother carried an allele for that trait
d) his mother carried at least one allele for that trait

the real answer is b. scintillation counter

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

hope it ,

bioteacher101

other information encoded in your genes might distinguish you from the others in the group