Chapter 9 Flashcards
Half of the yield gains in cereal crops is due to genetic improvement.
True
Strict cross-pollinators do not require an outside source of pollen.
False
Yield is an example of a quantitative trait.
True
Flower color is an example of a quantitative trait.
False
Pease are an example of a cross-pollinating species.
False
The resulting phenotypic ratio of the cross of two heterozygotes would be 3:1
True
A genotype of GG would be homozygous.
True
Lodging resistance is an example of a harvestability trait.
True
Persistence is a trait that would most often be improved in annuals.
False
Plant breeding strategies do not depend on pollination systems.
False
High amounts of genetic variation in germplasm are desired at the start of a breeding program.
True
The USDA is not currently conducting plant explorations.
False
Cross-pollinated species tend to be more uniform than self-pollinated species.
False
Hybridization is generally a better technique than mass selection for cross-pollinated species.
True
Agrobacterium tumefaciens can transmit its DNA to other cells.
True
In 2007, the majority of cotton, alfalfa, and corn planted was genetically modified.
False
It is possible to transfer a single gene using traditional breeding methods.
False
The maximum number of genetic traits that can be transferred it a single cultivar is four.
False
Most modern crop varieties are patented to protect the intellectual property of those who developed them.
True
When pollen is transferred to the stigma of the same flower, it is:
self-pollination
DNA is organized into units called:
genes
Plants that have two copies of each chromosomes are:
diploids
The total genetic makeup of a plant is known as its:
genotype
The term that describes a group of genetically similar plants that can be distinguished from other groups within the same species is:
cultivar
