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Biology
A Level

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Answered by Lewys B. Biology tutor
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The allele y occurs with a frequency of 0.8 in a population of clams. Give the frequencies of the genotypes YY, Yy and yy.

To do this we use the Hardy-weinburg equation.p2+2pq+q2=1frequency of y = q, frequency of Y=pFirst we work out the frequency of Y(p)p+q=11-0.8=0.2p=0.2Then we plug our p and q values...

Answered by Biology tutor
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What are the three main properties of the genetic code?

Triplet code - a sequence of three bases (called a codon) codes for an amino acid. Degenerate code - more than one codon can code for a single amino acidnon-overlapping - the bases in the genetic code are...

Answered by Biology tutor
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Describe the main differences between mitosis and meiosis

Number of cell divisions: there is 1 cell division in mitosis and 2 in meiosis. Daughter cells: mitosis produces 2 daughter cells genetically identical to each other and the parent cell, whereas meiosis p...

Answered by Jennifer A. Biology tutor
2420 Views

Describe how an action potential is generated.

The generation of an action potential occurs in 4 main steps (resting potential, depolarisation, repolarisation and hyperpolarisation). At resting potential, the membrane potential is about -70mV. A stimu...

Answered by Biology tutor
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