Title: Quiz 3 Crop Improvement
Course: MASTER-AGRI-1131-WB-Fairley > Section: Module 3 – Crop Improvement | Climate & Weather

The exam contains 20 multiple choices and true/false questions. Students will have one attempt and a 25 minute time limit to complete the quiz.

Q: A crop variety is a group of plants with different genetic composition
- True
- False
A: False

Q: Plant breeders develop varieties that have large and uniform seeds with high rates of
germination.
- True
- False
A: True

Q: The ease with which a crop can be harvested with minimum loss of the product in the
field has no affect on the yield of that crop.
- True
- False
A: False

Q: With some perennial plants, such as forages, the ability of the plant to resume
growth after harvest can also greatly affect its yield.
- True
- False
A: True

Q: There are two basic kinds of selection, mass selection and pedigree selection.
- True
- False
A: True

Q: Mass selection involves the selection of desirable plants from a small population of
plants.
- True
- False
A: False

Q: Pedigree selection involves selecting individual plants and growing out the progeny of
each selected plant in a separate row.
- True
- False
A: True

Q: A hybrid is the progeny or offspring resulting from the cross-fertilization of
three unrelated crop strains, varieties, species, or genera.
- True
- False
A: False

Q: When two inbred lines are crossed, the resulting progeny is called a double cross
hybrid.
- True
- False
A: False

Q: The single, double, and three-way cross hybrids are commonly used in commercial
seed corn production.
- True
- False
A: True

Q: A variation of hybridization is backcrossing.
- True
- False
A: True

Q: A cultivar is a variety that will remain genetically pure for several
generations.
- True
- False
A: True

Q: Gene mapping allows the breeder to identify the location of specific genes on the
chromosomes.
- True
- False
A: True

Q: A hybrid is a variety whose offspring will be the same as the parents because of
the genetic diversity of the parents.
- True
- False
A: False

Q: Crop improvement involves both sexual and asexual reproduction and propagation.
- True
- False
A: True

Q: A decrease in yield and quality is the ultimate goal of crop improvement.
- True
- False
A: False

Q: Resistance is the ability of the plant to withstand adverse environment conditions and
still produce an economic product.
- True
- False
A: True

Q: Resistance comes in two forms, avoidance, and tolerance.
- True
- False
A: True

Q: Avoidance enables the plant to tolerate or withstand an unfavorable situation.
- True
- False
A: False

Q: Increased yield can also be accomplished by developing varieties that are adaptable to a
variety of growing conditions.
- True
- False
A: True