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What is the probability of offspring (both male and female) being affected by haemophilia if both parents are unaffected?

Haemophilia is a sex-linked genetic recessive disease, meaning it is associated with a gene located on the X chromosome. As males have only one X chromosome, inheriting that chromosome will mean that they wi...
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Answered by Ella B. • Biology tutor
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How does the heart pump oxygen around the body?

Our heart can be divided into a left and right side, each containing two chambers: an atrium and a ventricle. Low pressure blood flows into the atria and is pumped out of the ventricles (high pressure); thes...
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Answered by Ella B. • Biology tutor
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what is the gradient and y intercept of the equation y=7x+7

gradient =7 y intercept = 7
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Answered by Mohammad E. • Maths tutor
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Explain the processes involved in the formation of a waterfall. (6 marks)

A waterfall is an erosional landform, which occurs where there is a layer of hard rock on top of a layer of softer rock. Erosional processes such as hydraulic action and abrasion occur as the river flows dow...
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Answered by Hannah C. • Geography tutor
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Find the roots of the equation y = 2x^2 + 5x + 2.

The root of an equation is a point where, when the equation is plotted on a graph, it crosses the x axis. The x axis is the line y = 0, so the roots can be found by setting 0 = ax 2 + bx + c where a,b and c ...
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Answered by Will U. • Maths tutor
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