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What is NOT a concern with those who analyse the DNA of ancient hominins.

a) Contamination by laboratory workers handling the specimens b) That the ancient DNA might infect the archeologists. c) The degradation of the DNA by chemical damage over time d) The introduction of modern DNA onto the sample by archeologists in the field site.

Emma

Answers

rnb1993

13 May 2013

Could you think of how badly some of these factors might be a concern? Obviously 3 of them are a concern - perhaps it would be easier to identify them? The one of least concern would then be your answer.

ianmoth

13 May 2013

If you look at the options, three of them sound plausible and one sounds like the plot of a bad sci-fi movie - that one is your answer!!!

docmarsh

15 May 2013

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Biology Year 10 (genetics)?

It shows a family tree. The genotypes of the grandparents regarding a recessive genetic mutation (a) that causes a genetic disorder are given. I can't draw it, so I'll describe it. The first grandma is AA and grandpa is Aa. They gave birth to the father. The second grandma is Aa and the grandpa is Aa too. They gave birthe to the mother. The mother and father then gave birth to the child... QUESTION: What percent chance does the child have of inheriting the disorder? Of being a carrier? Of not carrying the mutation at all? Show your work. QUESTION 2: You discover that those with the disorder rarely live beyond 5 years. How does this change the percentages? Show your work. It's one of the homework questions for test revision and I can't do it!

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