DNA, Genes & Chromosomes — Drills · Grade 7 Science
Chapter: Genes, Cell Division & HeredityWhat these drills covers
By the end of DNA, Genes & Chromosomes you should be able to:
- I can explain dna, genes & chromosomes.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: DNA, gene, allele, chromosome, phenotype.
Problem 1
Which relationship is correct?
- A gene contains every chromosome
- A chromosome contains DNA with many gene regions
- DNA is an organ
- Alleles are whole species
Answer and explanation
A chromosome contains DNA with many gene regions
Gene regions occur within genetic material organized into chromosomes.
Problem 2
How can two cells with similar DNA have different functions?
Answer and explanation
They can use different parts of the information and develop different structures and cellular activities.
Problem 3
Is a gene normally a whole chromosome?
Answer and explanation
No. A gene is a region of genetic material; a chromosome contains many regions and other DNA.
Problem 4
Can a capital letter alone prove dominance in a real organism?
Answer and explanation
No. Dominance describes an observed relationship between allele effects in a specified model, not a property of typography.