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Flashcards in Chapter 9 Deck (31)
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1
Q

Half of the yield gains in cereal crops is due to genetic improvement.

A

True

2
Q

Strict cross-pollinators do not require an outside source of pollen.

A

False

3
Q

Yield is an example of a quantitative trait.

A

True

4
Q

Flower color is an example of a quantitative trait.

A

False

5
Q

Pease are an example of a cross-pollinating species.

A

False

6
Q

The resulting phenotypic ratio of the cross of two heterozygotes would be 3:1

A

True

7
Q

A genotype of GG would be homozygous.

A

True

8
Q

Lodging resistance is an example of a harvestability trait.

A

True

9
Q

Persistence is a trait that would most often be improved in annuals.

A

False

10
Q

Plant breeding strategies do not depend on pollination systems.

A

False

11
Q

High amounts of genetic variation in germplasm are desired at the start of a breeding program.

A

True

12
Q

The USDA is not currently conducting plant explorations.

A

False

13
Q

Cross-pollinated species tend to be more uniform than self-pollinated species.

A

False

14
Q

Hybridization is generally a better technique than mass selection for cross-pollinated species.

A

True

15
Q

Agrobacterium tumefaciens can transmit its DNA to other cells.

A

True

16
Q

In 2007, the majority of cotton, alfalfa, and corn planted was genetically modified.

A

False

17
Q

It is possible to transfer a single gene using traditional breeding methods.

A

False

18
Q

The maximum number of genetic traits that can be transferred it a single cultivar is four.

A

False

19
Q

Most modern crop varieties are patented to protect the intellectual property of those who developed them.

A

True

20
Q

When pollen is transferred to the stigma of the same flower, it is:

A

self-pollination

21
Q

DNA is organized into units called:

A

genes

22
Q

Plants that have two copies of each chromosomes are:

A

diploids

23
Q

The total genetic makeup of a plant is known as its:

A

genotype

24
Q

The term that describes a group of genetically similar plants that can be distinguished from other groups within the same species is:

A

cultivar

25
Q

Which of the following is NOT an example of a harvestability trait?

A. increased leafiness
B. uniformity of maturity
C. lodging resistance
D. shatter resistance

A

A. increased leafiness

26
Q

The development of a new cultivar averages how many years?

A

5 years

27
Q

The advancement of which of the following crops is considered America’s greatest achievement?

A. soybean
B. wheat
C. barley
D. corn

A

D. corn

28
Q

Which of the following crops have had their genome sequenced?

A. rice
B. sorghum
C. oats
D. buckwheat

A

A. rice

29
Q

How are transgenic plants generated once genes have been transferred into cells using biotechnology?

A

by tissue culture

30
Q

What is the most prevalent trait that has been incorporated into transgenic crops?

A

herbicide resistance

31
Q

Saving seed that is patented and then growing or selling it is called:

A

seed piracy