Variation
- Created by: Dominic Hayward
- Created on: 31-10-13 14:35
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- Variation
- Interspecific is variation in different species where as intraspecific is variation within a species.
- Causes of intraspecific variation
- Environmental Factors
- Genes set the boundaries of a phenotype but environmental factors determines the phenotype.
- Genetic Factors
- Meiosis causes variation due to crossing over and independent segregation
- Mutations are a sudden change in DNA and may be passed on to the next generation.
- Fusion of gametes is where an offspring takes characteristics from both parents, making a new
- Alleles are different in each individual and create genotypes. This causes variation in phenotype.
- Environmental Factors
- Investigating Variation
- Samples are used to save time.
- Random sampling used to get a fair and representative sample
- The mean is used to find an average .
- A bell-shaped graph is a normal distribution curve as it is symmetrical to the mean.
- The standard deviation is used to see how spread out the values are.
- A small distribution mans that the values are close together.
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