GCSE science for the 21st century: Topic B1 You and your Genes

A gene is...
1. The nucleus of a cell
2. A pair of chromosomes
3. A section on a chromosome
4. A long strand of DNA
A chromosome is made of DNA
1. True
2. False
How many chromosome pairs do you have?
1. 46
2. 23
3. 46 from Mum and 46 from Dad
Which is the recessive gene here?
1. c
2. H
3. Hh
4. C
Is the gene combination "Dd"...
1. Homozygous
2. Heterozygous
What % of the children of these parents would, statistically, not have Huntington’s disease?
1. 100%
2. 75%
3. 50%
4. 25%
What % of the children of these parents would, statistically, die very young from Huntington’s disease?
1. 100%
2. 75%
3. 50%
4. 25%
What % of the children of these parents would, statistically, develop Huntington’s disease in later life?
1. 100%
2. 75%
3. 50%
4. 25%
The symptoms of Huntington’s disease include:
1. Build-up of mucus in the lungs
2. Build-up of mucus in the pancreas
3. Confusion, memory loss
4. Respiratory problems
What % of the children of these parents would, statistically, have cystic fibrosis?
1. 100%
2. 50%
3. 25%
4. 0%
What % of the children of these parents would, statistically, carry cystic fibrosis?
1. 100%
2. 50%
3. 25%
4. 0%
A clone is_______?_______ to the parent organism
(choose the best answer)
1. physically identical
2. genetically equivalent
3. genetically identical