Chromosomes and Genes (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Where are chromosomes located in a cell?
Where are chromosomes located in a cell?
In the nucleus
What is chromatin?
What is chromatin?
Tangled thread-like chromosome material
What proteins do DNA molecules wrap around in chromosomes?
What proteins do DNA molecules wrap around in chromosomes?
Histones
How many chromosomes do humans typically have per cell?
How many chromosomes do humans typically have per cell?
46
What is a gene?
What is a gene?
A DNA section coding for a protein
What is the genome?
What is the genome?
All genetic material in an organism
What are the specialised cells called that pass genetic material to offspring?
What are the specialised cells called that pass genetic material to offspring?
Gametes
How does epigenetics differ from genetics?
How does epigenetics differ from genetics?
It changes gene expression, not sequence
What does methylation do to genes?
What does methylation do to genes?
Prevents them from working
What happens when DNA is wound too tightly around histones?
What happens when DNA is wound too tightly around histones?
Genes become inaccessible
Which factor can influence gene expression through epigenetic mechanisms?
Which factor can influence gene expression through epigenetic mechanisms?
Diet and nutrition
What happens to DNA sequence when epigenetic changes occur?
What happens to DNA sequence when epigenetic changes occur?
It remains unchanged