Pre Test (Inheritance and Evolution)

Which is the correct statement about phenotypic variation?

• Variation in phenotype caused by differences in genotype

• Variation in phenotype caused by differences in genotype and environment

• Mutation is the ultimate source of phenotypic variation

• Environment greatly influences phenotypic variation

Phenotypic variation occurs when the expression of genes is changed in response to the environment.

• True

• False

Which statement is not a continuous variation?

• Tends to be quantitative

• Strongly influenced by the environment

• Controlled by a lot of genes

• Tends to be qualitative

Natural hair color, eye color, blood groups, human gender are examples of...

• Discontinuous variation

• Continuous variation

What is an example of continuous variation?

• Wrist circumference

• Eye colour

• Human gender

• Colour of petals

Check two correct statement about discontinuous variation!

• Tends to be quantitative

• Controlled by a few genes

• Unaffacted by the environment

• No distinct categories