Answers to AQA GCSE Genetics & inheritance part 2(Biology)
Practice Questions
1.Dimples in humans is controlled by a single gene. Dominant allele D indicates dimples will be present, whilst recessive allele d indicates no dimples.
In each of the following cases draw punnet squares to predict the probablility of offspring with or without dimples.
1a. Two parents that are both homozygous dominant
1b. Two parents that are both homozygous recessive
1c. One parent is homozygous dominant, whilst the other is homozygous recessive
1d. One parent is homozygous dominant, whilst the other is heterozygous
1e. Both parents are heterozygous.
Factors affecting the rate of photosynthesis
Measuring & calculating rates of photosynthesis
Inverse square law and photosynthesis
Economics of enhancing the conditions in greenhouses
Investigating the effect of light intensity on the rate of photosynthesis
Data analysis and nervous system
The effect of a factor on human reaction time
Controlling blood glucose concentration
Regulating water and nitrogen levels in the body.
Hormones and human reproduction
Using hormones to treat infertility
Control and coordination in plants using hormones
Investigating the effect of light or gravity on the growth of newly germinated seedlings