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Tom and Lesley are married and have a child, Sally, who has Cystic Fibrosis. Lesley has just found out she is pregnant, so what is the probability that the baby will have the condition?

Cystic Fibrosis is a recessive disease, therefore for Sally to have the condition she must have a homozygous recessive genotype, with one recessive allele of the gene from the mother and one from the father....
LD
Answered by Lillie D. • Biology tutor
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What is a 'convention' in UK politics?

Conventions are one of the sources of the UK constitution. They are effectively unwritten rules which regulate the conduct of government. An example is the Salisbury Convention, under which the House of Lord...
MA
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The area of a square is 49cm^2. The perimeter of this square is equal to the circumference of a circle. Calculate the radius of the circle to 1 decimal place.

To calculate the perimeter (the length of the outside edge) of a square, you must add up the length of each side. Here, we have been given the area of the square. The area of a square is calculated by squari...
FB
Answered by Faith B. • Maths tutor
19621 Views

If y = 2^x, solve the equation 8(4^x) + 9(2^x) + 1 = 0 in terms of y.

We first see that we are asked to solve the equation in terms of y. We can see that y = 2^x, and there is also a 2^x in the equation, meaning we can instantly change that to y. However, there is also a 4^x, ...
SR
Answered by Satveer R. • Maths tutor
10064 Views

If x = 3, what is the value of 2x^2

As we are told that the value of x is equal to 3, we are able to substitute this into our equation, so it becomes: 2(3)^2. We then use the rules of BIDMAS, so we must square the number 3 first (meaning we mu...
SR
Answered by Satveer R. • Biology tutor
49338 Views