Download Practice Problems for Genetics Test

Practice Problems for Genetics Test
1. Dominance and recessive
Cystic fibrosis is an inherited disease where a person has cysts or growths on their
lungs that makes it very difficult to breathe. People with cystic fibrosis rarely live
beyond the age of 20. Cystic fibrosis is recessive. The normal gene (no cysts) is
dominant.
What are the possible offspring phenotypes of a couple where the man is
heterozygous for the normal condition and the woman is homozygous for the
normal gene? Show the completed Punnett Square for the cross and list the
possible phenotypes.
2. Sex-Linked
In reindeer, the red nosed condition is recessive to the black nosed condition, which
is dominant. It is also sex-linked.
Assume that a red nosed male reindeer is crossed with a heterozygous black
nosed female reindeer.
Indicate the different phenotypes of the offspring and the ratio that they will appear.
3. Incomplete Dominance
In snapdragons, red, pink, and white colored flowers are possible.
If a red flower in crossed with a pink flower, show the offspring that would
result from this cross. Show the Punnett square for the cross and give the
phenotype ratios of the offspring.
4. Blood Types
In humans, blood types A, B, AB, and O are possible.
You are a world famous geneticist who has been called in on a paternity suit.
The woman, Lisa, claims that Ben is the father of her child. Lisa has been
typed with type AB blood. Ben has type O blood. Can Ben be the father of
this child if the child has been determined to be type AB? Set up a Punnett
Square to prove your answer.
Vocabulary to Know:
1. Gregor Mendel
2. genotype
3. phenotype
4. heterozygous
5. homozygous
6. alleles
7. genes
8. dominance
9. recessive
10. incomplete dominance
11. multiple alleles
12. sex linked
13. traits
14. law of segregation
15. law of independent assortment
16. monohybrid cross
17. dihybrid cross
18. heredity
19. punnett square
20. genetics
21. role of environment on genes
22. test cross
23. Sex chromosomes
24. Autosomes
25. Transcription
26. DNA – use, structure, sugar
27. RNA –use structure, sugar
28. mRNA
29. tRNA
30. rRNA
31. nucleotides
32. purine
33. pyrimidine
34. codon
35. anticodon
36. translation
37. amino acid
38. template
39. Initiation and stop codons
40. Replication
41. Mutations
42. Deletion mutation
43. Inversion mutation
44. Duplication mutation
45. Nondisjunction mutation
46. Translocation mutation
47. Point mutations
48. Frameshift mutations
DNA:
mRNA:
AA:
TAC
CCG
GAT
CAT
TTT
AAA
GGT
AAT