Variation
This is a Check for Understanding of variation.  You will be able to see your score and edit your responses to correct answers.
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Mark each statement as true or false. *
6 points
True
False
Variation may be shown in physical appearance, metabolism or behaviour.
All organisms mate randomly
Each gamete produced by a single sexually reproducing individual is unique
Natural selection can occur without variation in the population.
All mutations are harmful
Variation only depends on genes.
Match each definition with the term. *
8 points
Variation
Allele
Mutation
Phenotype
Crossing over
Diploid
Haploid
Gene flow
Possesses a pair of alleles for any particular gene.
Change in the DNA sequence
Observable characteristics and traits of an individual
Version of a gene
Contains only one allele per gene
Migration brings new alleles into the population
Differences in characteristic within a population
Exchange of chromosome segments during meiosis
Indicate if the statement represent discrete or continuous variation. *
8 points
Discrete
Continuous
Environment has more impact
Influenced by few genes
Influenced by many genes
Environment has less impact
For example, height
Phenotype falls into distinct categories
Phenotype varies along a continuum
For example, blood type
Match each statement with the source of genetic variation *
5 points
Mutation
Meiosis
Sexual Reproduction
The only source of variation in asexually reproduction
Crossing over of chromosome segments
Chromosomes move independently of one another
Creates new variations
Different combinations of parents
Which source of variation is shown? *
1 point
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Which source of variation is shown? *
1 point
Captionless Image
Which source of variation is shown? *
1 point
Captionless Image
Which source of variation is shown? *
1 point
Captionless Image
Which source of variation is shown? *
1 point
Captionless Image
Which source of variation is shown? *
1 point
Captionless Image
Which source of variation is shown? *
1 point
Captionless Image
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