Download 1b Unit 7 Working genetic problems practice 1

Working Genetic Problems Practice 1
Cheat sheet
Homozygous/Purebred = _________________
Homozygous Dominant:
Heterozygous/Hybrid = __________________
Heteroygous:
Homozygous Recessive:
Procedure
After viewing “Writing a Key” and “Writing Genotypes” PowerPoints, use your completed
Garden Pea Chart to write a key and parent genotypes of the following.
Problem
Key
Genotype
Cross
1. pea homozygous dominant for pod color x pea with
yellow pods
2. heterozygous inflated pea X homozygous dominant
pea
3. Both parents are yellow seeded hybrids
4. pea plant with terminal flowers X a hybrid
5. heterozygous tall pea X homozygous tall plant
6. white flowered pea X pea with pure purple flowers
7. white flowered pea X pea with heterozygous purple
flowers
8. both parents have wrinkled peas
9. both parents are heterozygous for pod shape
10. pea with pure axial flowers with one heterozygous
for the trait
1
Garden Pea Chart
Trait
Dominant
Recessive
smooth
wrinkled
yellow
green
inflated
constricted
green
yellow
purple
white
axial
terminal
tall
short
Seed shape
Seed color
Pod shape
Pod color
Flower color
Flower
location
Plant size
2