HELPhelp ASAP)If a substance has a half-life of 45 days, how much of the original substance would be left after 90 days?
A. One half (1/2)
B. One quarter (1/4)
C. One eighth (1/8)
D. One tenth (1/10)

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.