Cystic fibrosis is a recessive genetic disorder caused by a mutation of the ctrf gene. the disease is characterized by excessive mucus production along the respiratory and digestive tracts in addition to other symptoms. cystic fibrosis is a progressive disorder that is most associated with chronic respiratory disease. sara and anthony found out that they are both carriers of the disorder, but neither have the disease. what are the chances their child will be born with cystic fibrosis?

1: 4

Explanation:

Since both the parents in this case are the carrier of the cysytic fibrosis. Thus if a cross is carried out between the two parents , the punnet square  will be as follows –  

Genes of ParentsXX

XXXXX

YXYXY

Here the X is the carrier’s gene in both the parents

From the cross results it is clear that only one child (XX) is having both the mutated gene. Thus it will have the disease.

So the probability of an affected child is 1:4

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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a 2,000 calorie based diet.