Answer All the Question with True / False. 1. In order to change from sporophytic (2n) to gametophytic (n) generation, p

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Answer All the Question with True /
False.
1. In order to change from sporophytic (2n) to gametophytic
(n)
generation, plants must undergo meiosis
2. Cleistogamy enforces automatic self-fertilization in
plants
3. Two genes are linked when they are close to each other on the
same
chromosome but are not inherited together
4. In classical genetics, the expected genotype ratio obtained
from
selfing an f1 dihybrid is 9:3:3:3:1
5. Plant genetic resources are the lifeblood of conventional
plant
breeding.
6. In plant breeding, selection is made through variability
7. Plant breeding is sometimes referred to as evolution directed by
the
will of man.
8. Increase in crop productivity would be impossible without
plant
breeding
9. The act of plant breeding is as old as agriculture
10Both natural and artificial selection led to the domesticated
of
plant species
11.Plant breeding is sometimes define as genetic adjustment
of
plants to the service of mankind
12.Scientific crop breeding started before the discovery of
the
laws of genetics
13.The sole objective of plant breeding is to increase crop
yield
per unit area
14.Plant breeders cannot develop varieties with limited
natural
genetic variability
15. In monohybrid cross ,the genotype ratio is always equal
to
phenotypic ratio assuming complete dominance.
16.A test cross is the same as a backcross
17.A monohybrid is homozygous at all gene loci except one
18.A dihybrid is obtained by crossing two monohybrids
19.The center of diversity of coffee Abyssinia
20.The center of domestication of cassava is central America
21.A pure line is not always a true breeding line
22.A dihybrid upon selfing is expected to produce 9 different
genotypes
23.A 9:3:3:1 phenotype ratio is obtained in the f2 assuming
complete dominance and independent assortment of genes by
selfing a monohybrid
24.All perfect flowers are complete flowers but not all
complete
flowers are perfect
25.The embryonic sac contains six nuclei
26.A complete flower is always bisexual flower
27.Among vascular plants, the gametophytic generation
dominates the sporophytic generation
28.Maize is a monoecious plant
29.Both self-incompatibility and cleistogamy enforce self-
fertilization
30.In monohybrid inheritance, when two heterozygous are
mated,
a minimum of four individuals required for all classes to be
represented in their correct proportion.
31.Double fertilization leads in the formation of a triploid
endosperm and a diploid zygote
32.When a homozygous dominant and a heterozygous recessive
of a single gene pair are mated, all the offspring will be
heterozygous for the gene