The key terms that need to be defined to answer this dot point are:

• phenotype

• genotype

• gene

• expression

• assess

For many decades, scientists have investigated the relationship between genes and phenotype.

It has been found that 'Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype'. 

Source: https://www.nature.com/scitable/topicpage/environment-controls-gene-expression-sex-determination-and-982/#:~:text=Environment%20Can%20Impact%20Phenotype&text=Environmental%20factors%20such%20as%20diet,ultimately%20affects%20the%20animal's%20phenotype. 

This dot point is asking you to make a judgement as to the effect of genes and the environment on the expression of phenotype.

ACTIVITIES:

1. Complete the worksheets to the left of this text box which investigate the effect of the environment and genes on phenotypic expression.

2. Read and/or complete the questions on pages 178 -180 from the Yr 12 Pearson Biology Textbook.

3. Refer to the Additional links below for extra resources on this dot point.

https://www.nature.com/scitable/topicpage/phenotypic-range-of-gene-expression-environmental-influence-581/

4. Answer the dot point question 'Assess how genes and environment affect phenotypic expression'. 

Submit the written response for marking and feedback from your teacher.