Eye Color Genetics Calculator

Alright, I need to create a production-ready HTML calculator for an eye color genetics calculator, along with an SEO-optimized article. Let me break down the requirements and figure out how to approach this.

First, the calculator must be a single HTML file with embedded CSS and JavaScript. It should follow strict coding rules, using only var and avoiding modern JavaScript features. The layout needs to be single-column, centered, and responsive for mobile devices.

The calculator’s purpose is to determine the probability of eye color inheritance based on parents’ genotypes. So, I’ll need input fields for each parent’s eye color, which can be represented as alleles. The possible eye colors are brown, green, and blue, each with specific allele combinations.

I’ll structure the input section with dropdowns for each parent’s eye color. Each input should be wrapped in an .input-group for styling consistency. I’ll include a Reset button to restore default values and a Copy Results button for convenience.

For the calculations, I’ll need to determine the possible alleles each parent can pass on and then calculate the combinations for the child. The result will display the probabilities for each eye color. I’ll also include intermediate values showing the possible alleles from each parent.

The article section should explain eye color genetics in detail, covering the primary keyword, formula explanation, practical examples, how to use the calculator, key factors, FAQs, and related tools. I’ll ensure the keyword density is sufficient and include internal links where appropriate.

Styling-wise, I’ll use the specified primary color (#004a99) and success color (#28a745) to create a professional and trustworthy look. The background will be light (#f8f9fa) with clean borders and subtle shadows.

I’ll make sure all tables and charts are responsive. For the chart, I’ll use a canvas element to display the probability distribution, ensuring it updates dynamically with input changes.

Testing edge cases is crucial. I’ll handle invalid inputs gracefully and ensure the calculator updates results in real-time without errors.

Finally, I’ll structure the HTML with proper semantic tags, ensuring the title, meta description, and H1 include the primary keyword for SEO optimization. The article will be divided into clear sections with appropriate headings and short, readable paragraphs.

Putting it all together, I’ll write the complete HTML code, embedding CSS and JavaScript, and ensure all requirements are met without any markdown or placeholders.

Understanding Eye Color Genetics

Eye color is determined by the combination of alleles inherited from both parents. The brown allele (B) is dominant, while the blue allele (b) is recessive. Green eyes result from specific combinations of these alleles.