Hereditary diseases. History of genetic engineering
Answers are for parents and teachers.
1
Write the chromosomal cause of Down, Klinefelter and Shereshevsky–Turner syndromes.
Down – trisomy 21; Klinefelter – XXY; Shereshevsky–Turner – XO.
2
Name four factors that harm reproductive health.
Marriage between close relatives, alcohol, narcotics, smoking, sexually transmitted infections (any four).
3
Aa × Aa (a – recessive disease). Of 80 children, how many are expected to be affected? (Number only.)
20
4
Write two uses of genetic engineering in medicine.
Making human insulin and growth hormone with bacteria; producing protein vaccines; detecting hereditary diseases by DNA analysis.
5
Write the events of 1953, 1972, 1996 and 2003.
1953 – the DNA double-helix model; 1972 – the first recombinant DNA; 1996 – Dolly the sheep; 2003 – the Human Genome Project completed.