Nature vs Nurture (VCE SSCE Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why do identical twins show different phenotypes as they age despite having identical DNA?
Why do identical twins show different phenotypes as they age despite having identical DNA?
Environment & epigenetics affect them
What does proportionate heritability measure?
What does proportionate heritability measure?
Phenotypic variance explained by genes
How do environmental factors typically affect phenotype?
How do environmental factors typically affect phenotype?
By modifying protein performance
What percentage of human height variation is due to genetic factors?
What percentage of human height variation is due to genetic factors?
70-80%
Why do Himalayan rabbits have dark fur on their ears, nose, and paws?
Why do Himalayan rabbits have dark fur on their ears, nose, and paws?
Tyrosinase is active at low temps
What is epigenetics?
What is epigenetics?
Phenotype changes from gene expression
What effect does DNA methylation typically have on genes?
What effect does DNA methylation typically have on genes?
Silences and reduces expression
How does tighter DNA packing around histones affect gene expression?
How does tighter DNA packing around histones affect gene expression?
Decreases expression likelihood
During fruit ripening, what happens to methyl group levels in fruit genomes?
During fruit ripening, what happens to methyl group levels in fruit genomes?
They drop by approximately 30%
Why do identical twins become increasingly different as they age?
Why do identical twins become increasingly different as they age?
Epigenetic changes pass to new cells