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Describe the application of DNA profiling to determine paternity and also in forensic investigation.

Organisms have short sequences of bases, which are repeated many times. These are called satellite DNA. These repeated sequences vary in length from person to person.

The DNA is copied using P...

Answered by Zana Katarina L. • Biology tutor

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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's the difference between an animal cell, a plant cell and a bacterial cell?

There are a few differences that you can use to tell apart or describe these types of cells.

The first distinguishing feature is whether the cell is eukaryotic or prokaryotic - this helps to s...

Answered by Azelie W. • Biology tutor

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