Educational diagram explaining the structure and function of genes, chromosomes, and DNA in human cells.

Problem Overview:

The task involves filling in the blanks and boxes in a worksheet about genes, chromosomes, and DNA. The provided words at the bottom of the page are to be used to complete the sentences and labels.

Solution:

#### Step 1: Analyze the Worksheet
The worksheet is divided into sections explaining the relationship between genes, chromosomes, and DNA. Each section has blanks that need to be filled using the provided words.

#### Step 2: Fill in the Blanks and Boxes

1. Top Right Box:
- "Chromosomes are always in pairs. There is one chromosome from each parent."
- Explanation: Chromosomes occur in pairs (one from each parent) in most cells of the body.

2. Middle Left Box:
- "Most cells in your body have a nucleus. The nucleus contains your genetic material in the form of multiple DNA molecules."
- Explanation: The nucleus stores genetic information in the form of DNA molecules.

3. Middle Center Box:
- "The human cell nucleus contains 23 pairs of chromosomes."
- Explanation: Humans have 46 chromosomes in total, arranged in 23 pairs.

4. Middle Right Box:
- "Chromosomes carry DNA. Different genes control the development of different types of characteristics, e.g., hair and eye color."
- Explanation: Chromosomes contain DNA, and genes on the DNA control various traits or characteristics.

5. Bottom Left Box:
- "The DNA is made up to form the genes of the human genome."
- Explanation: DNA is composed of genes, which together make up the human genome.

6. Bottom Center Box:
- "A gene is a short length of the chromosome... ...which is quite a long length of DNA."
- Explanation: A gene is a segment of DNA that codes for a specific trait or function.

7. Bottom Right Box:
- "There can be different versions of the same gene, which give different versions of a trait, like blue or brown eyes. The different versions of the same gene are called alleles instead of genes."
- Explanation: Alleles are variations of the same gene that result in different traits.

8. Labels:
- "Nucleus": This is already labeled.
- "Chromosomes": This is already labeled.
- "Double helix": This is already labeled.

#### Step 3: Verify the Words Used
The words used to fill in the blanks are:
- Pairs
- Parent
- Genetic material
- DNA molecules
- 23
- DNA
- Control
- Characteristics
- Genes
- Genome
- Gene
- DNA
- Different versions
- Trait
- Alleles

All these words are from the provided list at the bottom of the page.

Final Answer:

The completed worksheet with all blanks filled is as follows:

1. Top Right Box:
- "Chromosomes are always in pairs. There is one chromosome from each parent."

2. Middle Left Box:
- "Most cells in your body have a nucleus. The nucleus contains your genetic material in the form of multiple DNA molecules."

3. Middle Center Box:
- "The human cell nucleus contains 23 pairs of chromosomes."

4. Middle Right Box:
- "Chromosomes carry DNA. Different genes control the development of different types of characteristics, e.g., hair and eye color."

5. Bottom Left Box:
- "The DNA is made up to form the genes of the human genome."

6. Bottom Center Box:
- "A gene is a short length of the chromosome... ...which is quite a long length of DNA."

7. Bottom Right Box:
- "There can be different versions of the same gene, which give different versions of a trait, like blue or brown eyes. The different versions of the same gene are called alleles instead of genes."

8. Labels:
- "Nucleus"
- "Chromosomes"
- "Double helix"

Final Answer: \boxed{\text{See above}}