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Why does a dominant allele mean a higher probability that offspring are affected by a disease?

To start with lets define an allele - these are different versions of the same gene. Genes are small sections of DNA which carry codes to tell your body what proteins to make. Each gene has two alleles ...

MF
Answered by Maggie F. Biology tutor
3231 Views

Why are there so many different forms of "the" in German?

All nouns in German have a 'case' and this means that a different form of the noun is used depending on what its role is in the sentence. For example, if it is the subject (the 'do-er' of the action) or t...

AH
Answered by Alice H. German tutor
4128 Views

Why do some verbs take avoir in the passé composé and some être?

French is a language that has lots of grammatical rules and irregularities but there are ways of remembering confusing constructions like this! The general rule is that verbs about movement or the change ...

AH
Answered by Alice H. French tutor
1383 Views

Consider the right angled triangle with vertices labelled a, b, c. Angle A = 60°, Angle B = 90°, length ab=4cm, length ac=xcm. If cos60° = 0.5, work out the value of x.

The first thing to do in such a question is to draw out the information you have been given. Not only does this help to process the question again, so that no vital information is missed,...

RR
Answered by Rebecca R. Maths tutor
4517 Views

Describe how blood vessels help to control body temperature?

In hot environments, blood vessels under the surface of the skin dilate to allow more blood to flow through them. This causes more heat to be lost from the blood to the environment so body temperature dec...

AC
Answered by Annabel C. Biology tutor
3048 Views

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