1. Mendelian Genetics
Sample word problems

2. In labrador retrievers, black fur (B) is dominant to yellow fur (b)

3. In labrador retrievers, black fur (B) is dominant to yellow fur (b)
1. Predict the offspring from a cross between two homozygous black labs

4. In labrador retrievers, black fur (B) is dominant to yellow fur (b)
2. Predict the offspring from a cross between two homozygous yellow labs

5. In labrador retrievers, black fur (B) is dominant to yellow fur (b)
3. Predict the offspring from a cross between a heterozygous male and a yellow female

6. Widow’s peak (H) is a dominant trait
4. These two have a baby with a smooth hairline. Determine their genotypes and the genotype of the baby

7. Widow’s peak (H) is a dominant trait
5. Based on what you know from the last question, make a prediction about what might happen if these two had kids together

8. Albinism (a) is recessive
6. Predict the offspring of a cross between a homozygous normal python with an albino python
Show the genotypes both parents and the offspring

9. Albinism (a) is recessive
7. Predict the offspring of a cross between a heterozygous python with an albino python
Show the genotypes both parents and the offspring

10. Albinism (a) is recessive
8. Predict the offspring of a cross between 2 heterozygous pythons
Show the genotypes both parents and the offspring

11. Albinism (a) is recessive
9. Predict the offspring of a cross between 2 albino pythons
Show the genotypes both parents and the offspring

12. The rooster has “grizzly” feathers. The hen has solid color feathers.
This rooster and this hen have 10 offspring, all with solid color feathers
10. What does that tell you about the feather color trait?

13. The rooster has “grizzly” feathers. The hen has solid color feathers.
This rooster and this hen have 10 offspring, all with solid color feathers
11. What are the genotypes of the rooster, the hen, and all the offspring?

14. Drosophila melanogaster The common fruit fly
12. A grey fly mates with a white fly. All the offspring are grey.
Which color is dominant?

15. Drosophila melanogaster The common fruit fly
13. Predict the offspring from a cross between two heterozygous grey fruit flies?
Show the genotypes both parents and the offspring

16. Vestigial wings is a recessive mutation.
14. What offspring will result from a cross between 2 vestigial winged flies?
Show the genotypes both parents and the offspring

17. In fruit flies, stubble bristles (b) is a recessive mutation
15. Predict the offspring from a cross between two heterozygous normal flies
Show the genotypes both parents and the offspring

18. In fruit flies, stubble bristles (b) is a recessive mutation
16. Predict the offspring from a cross between 2 stubble bristle flies
Show the genotypes both parents and the offspring