Question

work: topic 4 lesson 2 describing chromosomes
8th grade science
name:
date:
base your answers to questions 1 through 3 on the information below and your
knowledge of science.
chromosomes and genes
gregor mendel’s ideas about inheritance and probability can be applied to all
living things. mendel determined that traits are inherited using pieces of information that
are called genes. these genes are passed from parent to offspring during sexual
reproduction.
1
order the structures in the model from smallest to largest by writing numbers one
through five in the blank circles. number one is the smallest structure while
number five is the largest structure.
scale of genetic material
nucleus
cell
chromosome
dna
gene

Explanation:

Step1: Recall Genetic Structure Hierarchy

Genetic structures from smallest to largest: Gene (segment of DNA), DNA (molecule), Chromosome (packaged DNA), Nucleus (contains chromosomes), Cell (contains nucleus).

Step2: Assign Numbers

• Gene: 1 (smallest)
• DNA: 2
• Chromosome: 3
• Nucleus: 4
• Cell: 5 (largest)

So the circles (from bottom - Gene, DNA, Chromosome, Nucleus, Cell) get 1, 2, 3, 4, 5 respectively.

Answer:

Gene: 1, DNA: 2, Chromosome: 3, Nucleus: 4, Cell: 5 (assign these numbers to their respective circles)