Goggles, lab coat, hair up, gloves,
"If I heard a herd of elephants talking to one another and being together regularly, I would capture their noises. Then I would play them into the ground at a separate spot far away from the herd of elephants. I would observe the elephants' reactions while I recorded them by playing various recordings through the ground (ex. if they freeze in place when they feel the vibrations, how they react afterwards, etc.). To compare and analyze the elephants' behavior, I would record this information and repeat the procedure several times."
Behavior- The reactions of a complete live organism to internal and/or external stimuli are internally coordinated behaviors.
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The answer is; C
It is caused by the recessive allele because the parents appear normal but are carriers of the disorder (meaning they are heterozygous for Pseudohypertrophic muscular dystrophy). Only when the offspring is heterogenous recessive do they display the disorder.
The disorder is also sex-linked because it tends to affect only boys. This means that the disorder is probably coded for by alleles in the Y- chromosome that determines the male sex.