Genetic Crosses that Involve 2 Traits--Complex Problems
|Genetic Crosses that Involve 2 Traits--Complex Problems|Name ___________________ |
| |SHOW YOUR WORK!!! |
| In llamas, floppy ears are dominant to pointy ears. | |
|Also in llamas, bowlegs are recessive (normal legs | |
|would be dominant). | |
|1. Develop a "key" showing the letters for the two | |
|traits. (Each trait should have a different letter). | |
|Show the phenotypes of your letters too. | |
|Ex: FF = floppy ears; LL = normal legs | |
| | |
|[pic] | |
| | |
| 2. A llama with floppy ears (Ff) and bowlegs is | |
|crossed with one that is heterozygous for both traits. | |
|Show the genotypes of these two parents | |
|3. Draw a punnett square showing the resulting | |
|offspring | |
|4. Show the ratios of the resulting phenotypes, use | |
|fractions (not percentages). | |
|[pic] | |
| 5. A llama that has pointy ears and bowlegs is | |
|crossed with one that is homozygous dominant for both | |
|traits. Show the genotypes of the parents. | |
|6. Draw a punnett square showing the resulting | |
|offspring | |
|7. Show the ratios of the resulting phenotypes, use | |
|fractions (not percentages). | |
| | |
|[pic] | |
| | |
|8. A llama that is heterozygous for both traits is | |
|crossed with another llama that is heterozygous for | |
|both traits. Show the genotypes of the two parents. | |
|9. Draw a punnett square showing the resulting | |
|offspring. | |
|10. Show the ratios of the resulting phenotypes, use | |
|fractions (not percentages). | |
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