Variation and natural selection

The observable and measurable characteristics of an organism, determined by the genotype and the environment is the______.

Genetic variation is caused by:

• independent assortment of chromosomes in meiosis

• crossing over in meiosis

• random mating within a species

• random fertilisation of gametes

_______ _______ is the basis on which natural selection can act.

The branch of biological science studying the passing on of experiences an individual acquires in a lifetime is called:

Blood types are an example of:

• Continuous variation

• Discontinuous variation

Body height is an example of:

• Continuous variation

• Discontinuous variation

In continuous variation, different genes have [large/small] and [different/similar] effects on the phenotype.

When talking about natural selection, fitness is: