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Which of the Following Genotypes Would Result in a Green Monster? (Select ALL the Genotypes ; That Apply.) HhAA HHAA Hhaa HhAA HhAa

Question

Which of the following genotypes would result in a green monster? (Select ALL the genotypes ; that apply.) hhAA HHAA Hhaa HhAA hhAa HhAa HHAa hhaa HHaa

Solution

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Answer

Let's assume the monster's color is determined by two genes:* **H/h gene:** Dominant H leads to some color (let's say it allows pigment production), while recessive h leads to no color (no pigment).* **A/a gene:** Dominant A leads to yellow pigment, while recessive a leads to blue pigment. If H is present, these pigments combine to make green (yellow + blue = green).With this logic:* **hh** genotypes will *always* result in a colorless (likely white) monster regardless of the A/a genes, because no pigment is produced. So, hhAA, hhAa, and hhaa are eliminated.* **H_** genotypes (where _ can be either A or a) *can* produce color. If the monster produces color, the A/a gene determines *which* color.* **AA** or **Aa** genotypes will result in yellow pigment being produced. Combined with the H gene allowing color, this yellow + blue will result in a green monster.* **aa** genotypes will result in *only* blue pigment. Since there's no yellow to mix with, the monster will be blue, not green. This eliminates HHaa.Therefore, the genotypes that result in a green monster are:* **HHAA*** **HhAA*** **HhAa*** **HHAa**