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Mr & Mrs Smith have a child who has Cystic Fibrosis, yet they do not personally suffer from the condition. Explain, with the use of genetic crosses, how this is possible and, if they had another child, how likely the second child will have Cystic Fibrosis

As neither of the parents have the condition, it therefore is assumed to be a Homozygous Recessive condition, so requires both the recessive alleles for the disease to be present in an individual (eg ff)....

JN
Answered by Jack N. Biology tutor
4258 Views

Expand (t+5)(t-2)

FOIL stands for First,Outer,Inner and Last. This is the order of multiplying the terms from each set of brackets.First terms give: t x t=t2Outer terms give: t x -2=-2tInner terms give: 5 x t=5t...

OS
Answered by Ollie S. Maths tutor
4019 Views

solve this simultaneous equation: 4x+ y = 12 , 2x+ y = 8

 4x+ y = 12 , 2x+ y = 81) find the unknown (either x or y) that has the same coefficient. - In this example it is y2) Take away the equations from one another so you only have 1 unknown - 2x = 43) Divide ...

NS
Answered by Natasha S. Maths tutor
3124 Views

Name 3 things that can affect the activity of enzymes

1) Temperature: increasing the temperature increases the rate of reaction, however this can only happen to a certain point as beyond each enzyme's optimum temperature they get denatured (...

JC
Answered by Jessica C. Biology tutor
3014 Views

How do you solve inequalities when you have two inequality symbols in the expression, e.g. 4x - 6 < 14 < 3x + 2

So to tackle this question you have to imagine 4x + 6 < 14 < 3x - 2 as two separate inequalities.4x - 6 < 14 and 14 < 3x + 2
This still means the same thing but we have simplified it by ...

AP
Answered by Alice P. Maths tutor
3573 Views

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