OCR A Genetics and Evolution Quiz

Genes, Genetics and Genetic Engineering (and some Hardy Weinberg) Questions with Markschemes - for A-level Biology

Questions by topic for A-level Biology - Genes, Genetics and Genetics Engineering, for OCR A, AQA and Eduqas

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May 9, 2017 Tom Whitburn

Terrific exam question - combining autosomal linkage and Chi-Squared. Give it a go if you have ambition.....

Try this one - poor Manx cat !

Mr Spock, 2nd officer of the Starship Enterprise, has a Vulcanian father - Sarek. His mother - Amanda Grayson, is from Earth.

Vulcanians have pointed ears (P), adrenal-absent (A) and a right sided heart (R), all dominant to the human alleles.

The alleles for adrenal and heart are located on the same chromosome, while those for ear shape lie on a different chromosome.

If Mr Spock were to marry a woman from Earth, what would be the probability that?

· Their first child would have all Mr Spock’s characters?

· Their first child would have adrenal absent, but have human heart and ears?

· That if they had 2 children, one would have human features and the other Vulcanian?

Students find autosomal linkage a challenge ... I suspect this is because they mentally disconnect Meiosis from gamete formation.

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