Variation Flashcards
How do we know if 2 animals are the same species?
They share similar features.Can breed and have fertile offspring
What do we call differences between organisms?
variation
Variation (differences between individuals) is caused by…
Genes
Environment
Give 3 examples of variation that are caused by genes
Eye colour
Hair colour
Face Shape
Give 3 examples of variation that is caused by the environment.
Scars
Hair length
Amount of muscle
Give an example of variation that is caused by both genes and the environment
Nose shape - genes decide the shape but you may break it or have surgery
How are identical twins formed?
Fertilisation of an egg and sperm cellFormation of an embryo that splits in twoTwo new embryos grow into identical twins
Identical twins have the same…
genes
Variation between identical twins is caused by…
the environment
Why is the height of different students a continuous variable?
Because there are many different possible height values
Why is the eye colour of different students a categoric variable?
Because there are only a few possible values (blue, green, brown)