Top answers

How can I find the frequency of genotype Bb in a population given that the frequency of BB is 0.49? (Where B = dominant allele, b = recessive allele on the same gene).

The proportion of the population with genotype Bb can be calculated using the two equations of the Hardy-Weinberg principle. These equations are: p + q = 1 where: p = frequency of the dominant allele (B) q =...
CA
Answered by Caitlin A. • Biology tutor
7813 Views

What are public goods and how do they lead to the 'free-rider' problem?

A pure public good is a good that is consumed collectively; it is both non-excludable and non-rivalrous. These two main characteristics mean that people can't be stopped from consuming the good, and that one...
MC
Answered by Mathew C. • Economics tutor
3686 Views

Why do volcanoes form?

The primary ingredient for a volcano is magma. Magma is what we call melted rock. When rocks melt at depth they become less dense than the solid rocks around them and therefore they rise to the surface of th...
JL
Answered by Jake L. • Geology tutor
4073 Views

What is DNA made of?

DNA is made of small subunits called bases that join together to form a long chain. The bases in each chain join to the bases in another chain to form a structure that looks a bit like a ladder, with each ch...
BN
Answered by Ben N. • Biology tutor
2999 Views

Please can you explain what a heart attack is and how it can occur?

The heart is an organ made of muscle in the centre of the chest. It's role is to pump oxygenated blood around the body to enable our functions to be carried out. During a heart attack, a section of the heart...
VG
Answered by Vijay G. • Biology tutor
3455 Views