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Outline the use of polymerase chain reaction (PCR) to copy and amplify minute quantities of DNA.

PCR is a way of producing large quantities of a specific target sequence of DNA.

It is useful when only a small amount of DNA is available for testing (e.g. crime scene samples of blood, seme...

Answered by Zana Katarina L. • Biology tutor

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Explain that female carriers are heterozygous for X-linked recessive alleles.

· An individual with a recessive allele for a disease condition that is masked by a normal dominant allele is said to be a carrier

Answered by Zana Katarina L. • Biology tutor

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Define sex linkage

Sex linkage refers to when a gene controlling a characteristic is found on a sex chromosome (and so we associate the trait with a predominant gender)

· Sex-lin...

Answered by Zana Katarina L. • Biology tutor

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What are the events and stages that occur in Meiosis?

Meiosis is a reductioist devision of a diploid cell into four haploid gametes. It occurs in sex cells only and is responsible for genetic variation. Meiosis occurs in two steps, Meiosis I and Meiosis ...

Answered by Kathrin M. • Human Biology tutor

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How does neurotransmission across a synapse occur?

Neurotransmission, put simply, is how your brain controls your body. It occurs by the passage of action potentials (electrical signals) across a synapse betwee...

Answered by Krish M. • Psychology tutor

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