2. In guinea pigs, black eyes are dominant to red eyes. Choose a letter combination for each phenotype. underline ( )=black eyesunderline ( )=black eyesunderline ( )=red eyes 3. In a guinea pig cross for eye color a Bb-guinea pig was bred with a bb guinea pig. What percentage of the off spring should have Black eyes? What percentage should have red eyes? 4. In a guinea pig cross for eye color a BB guinea pig was bred with a bb guinea pig. What percentage of the off spring should have Black eyes? What percentage should have red eyes? 5. In a guinea pig cross for eye color a Bb guinea pig was bred with a Bb guinea pig. What percentage of the off spring should have Black eyes? What percentage should have red eyes? In guinea pigs, black eyes (BB, Bb ) are dominant to red eyes (bb)Short hair (HH,Hh) is dominant to long hair (hh) 6. A guinea pig with long hair (hh) is crossed with one that has short hair (H H). What percentage of the offspring will have short hair? 7. A guinea pig with long hair (hh)is crossed with one that has short hair (H h). What percentage of the offspring will have short hair?

2. Let's use "B" for the dominant black eye allele and "b" for the recessive red eye allele.<br /><br />* **BB** = black eyes<br />* **Bb** = black eyes<br />* **bb** = red eyes<br /><br />3. A Bb guinea pig (black eyes) crossed with a bb guinea pig (red eyes):<br /><br /> * Possible combinations: Bb, Bb, bb, bb<br /> * **50%** of the offspring should have black eyes (Bb).<br /> * **50%** of the offspring should have red eyes (bb).<br /><br />4. A BB guinea pig (black eyes) crossed with a bb guinea pig (red eyes):<br /><br /> * Possible combinations: Bb, Bb, Bb, Bb<br /> * **100%** of the offspring should have black eyes (Bb).<br /> * **0%** of the offspring should have red eyes.<br /><br />5. A Bb guinea pig (black eyes) crossed with a Bb guinea pig (black eyes):<br /><br /> * Possible combinations: BB, Bb, Bb, bb<br /> * **75%** of the offspring should have black eyes (BB, Bb).<br /> * **25%** of the offspring should have red eyes (bb).<br /><br />6. A guinea pig with long hair (hh) is crossed with one that has short hair (HH):<br /><br /> * Possible combinations: Hh, Hh, Hh, Hh<br /> * **100%** of the offspring will have short hair (Hh).<br /><br />7. A guinea pig with long hair (hh) is crossed with one that has short hair (Hh):<br /><br /> * Possible combinations: Hh, Hh, hh, hh<br /> * **50%** of the offspring will have short hair (Hh).<br />