Interactive chromosome learning worksheet for students, illustrating cell structure, DNA, and genetic concepts.

Let’s go step by step to fill in the blanks using the Word Bank.

---

Step 1: Look at #1 — “This is a _____.”

The image shows a round cell with smaller parts inside, including a nucleus. The whole thing is labeled as part of the chromosome diagram. Since it’s the entire structure shown (with organelles), and we’re learning about chromosomes which are inside cells, this must be a Cell.

✔ Answer for #1: Cell

---

Step 2: Look at #2 — “This is a _____. Chromosomes are located in the _____ of the cell.”

The arrow points to an X-shaped structure — that’s a classic picture of a chromosome. So first blank: Chromosome.

Then, where are chromosomes found? Inside the nucleus of the cell. That’s basic biology — chromosomes live in the nucleus.

✔ Answers for #2: Chromosome, Nucleus

---

Step 3: Look at #3 — “Chromosomes are made from tightly coiled _____ and protein. DNA has sections called _____.”

Chromosomes = DNA + proteins (histones). So first blank: DNA.

DNA is divided into functional units called genes — these are the instructions for traits.

✔ Answers for #3: DNA, Genes

---

Step 4: Look at #4 — “Genes have matching sets called _____. You get one from your mom and one from your dad.”

When you inherit genes, you get two versions — one from each parent. These matching pairs are called base pairs? Wait — no! Base pairs are the rungs of the DNA ladder (A-T, G-C).

Actually, the correct term here is alleles — but wait… “alleles” isn’t in the Word Bank!

Look again at the Word Bank:
Chromosome, Cell, Nucleus, DNA, Genes, Base pairs, Double helix

Hmm… maybe they mean base pairs? But that doesn’t fit — base pairs aren’t inherited as matching sets from mom and dad.

Wait — perhaps they’re simplifying. In many elementary worksheets, they say genes come in pairs — and since “pairs” isn’t there, but “base pairs” is… that might be a trick.

But actually — re-read: “Genes have matching sets called _____.”

In simple terms, when we talk about getting one gene from mom and one from dad, those are called alleles — but again, not in word bank.

Wait — look at the diagram: the arrows point to small dots on the chromosome arms — those represent gene locations. And the text says “matching sets”. Maybe they want base pairs? No, that’s too specific.

Hold on — let’s check the last clue.

#5 says: “The twisting ladder shape of DNA is called a _____.” → That’s definitely Double helix.

Back to #4 — if “alleles” isn’t available, and the only plural noun left that could fit is... wait — maybe they mean genes themselves? But it says “genes have matching sets called ___” — so it can’t be “genes”.

Wait — perhaps it’s a mistake? Or maybe they mean chromosome pairs? But again, not in word bank.

Let me think differently. In some curricula, they teach that genes come in pairs — and call them “gene pairs” — but still not in word bank.

Wait — what if they meant “base pairs” as in the pairing between strands? But that’s not inherited from parents — that’s molecular structure.

Actually — I think there’s a mislabeling here. Let’s read carefully:

“Genes have matching sets called _____.”

In genetics, the matching copies of a gene (one from each parent) are called alleles — but since it’s not in the word bank, and the only remaining option that makes sense in context is... none?

Wait — let’s list used words:

Used so far:
- #1: Cell
- #2: Chromosome, Nucleus
- #3: DNA, Genes
- #5: Double helix

Left in word bank: Base pairs

So maybe they want “base pairs” for #4? Even though it’s technically incorrect? Because in some simplified models, they might say genes are made of base pairs, and you get half from each parent? But that’s not accurate.

Alternatively — perhaps the blank is for “pairs” and they expect “base pairs” even if it’s not perfect.

But let’s look at the sentence again: “You get one from your mom and one from your dad.” — that describes inheriting one allele per gene locus.

Since “alleles” isn’t an option, and “base pairs” is the only thing left, and it’s commonly associated with DNA inheritance in simplified teaching, I’ll go with base pairs — even though it’s not precise.

Wait — another thought: maybe “matching sets” refers to homologous chromosomes? But again, not in word bank.

I think for the level of this worksheet, they probably intend base pairs for #4, even if it’s a bit off.

But let’s double-check standard answers for such diagrams.

Upon second thought — in many elementary science sheets, they say:

“Genes are segments of DNA. Each gene comes in pairs — one from each parent. These are called alleles.”

But since “alleles” isn’t here, and “base pairs” is, and the other blanks are taken, perhaps it’s a error — but we must use the word bank.

Wait — what if #4 is referring to the fact that DNA has base pairs, and those are inherited? Still not quite.

Another idea: maybe “matching sets” means the two strands of DNA pair up via base pairs — but that’s not about mom and dad.

I think the intended answer is base pairs, even if it’s not perfectly accurate for this context. Perhaps the worksheet is simplifying.

Alternatively — let’s see if “genes” can be reused? No, each blank should be filled once, and “genes” is already used in #3.

Word bank has 7 items, and there are 6 blanks? Let’s count blanks:

#1: 1 blank
#2: 2 blanks
#3: 2 blanks
#4: 1 blank
#5: 1 blank
Total: 7 blanks? Wait:

#1: "This is a _____." → 1
#2: "This is a _____. ... in the _____" → 2
#3: "coiled _____ and protein. ... called _____." → 2
#4: "called _____." → 1
#5: "called a _____." → 1
Total: 7 blanks.

Word bank has 7 words: Chromosome, Cell, Nucleus, DNA, Genes, Base pairs, Double helix.

Perfect — so each word used once.

We have assigned:

#1: Cell
#2: Chromosome, Nucleus
#3: DNA, Genes
#5: Double helix

That leaves Base pairs for #4.

Even though it's not biologically precise for "matching sets of genes", in the context of this worksheet, it must be Base pairs.

Perhaps they mean that the DNA sequence (made of base pairs) is inherited from both parents — so the matching set refers to the paired bases across strands? But the sentence says "you get one from your mom and one from your dad" — which implies inheritance of alleles, not base pairs.

However, for the sake of completing the worksheet with given options, we'll assign Base pairs to #4.

✔ Answer for #4: Base pairs

---

Step 5: Look at #5 — “The twisting ladder shape of DNA is called a _____.”

This is straightforward — the double-stranded twisted ladder is the double helix.

✔ Answer for #5: Double helix

---

Now, let’s compile all answers:

① This is a Cell.
② This is a Chromosome. Chromosomes are located in the Nucleus of the cell.
③ Chromosomes are made from tightly coiled DNA and protein. DNA has sections called Genes.
④ Genes have matching sets called Base pairs. You get one from your mom and one from your dad.
⑤ The twisting ladder shape of DNA is called a Double helix.

Note: While #4 is not scientifically accurate (it should be "alleles"), based on the word bank provided, "Base pairs" is the only remaining word, so it must be used here.

Final Answer:
① Cell
② Chromosome, Nucleus
③ DNA, Genes
④ Base pairs
⑤ Double helix