In a village, if the proportion of individuals who have sickle-cell disease is 0.50, and the population is assumed to be at Hardy-Weinberg equilibrium, what is the expected frequency of
the HbS allele? (Hint: What is the genotype of people with sickle-cell disease, and how is that
genotype represented in the Hardy-Weinberg equation?)
A.0.125
B.0.25
C.0.5
D.0.71

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

the median of the data is 4.5.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.