Tag: asexual and sexual reproduction in plants

Questions Related to asexual and sexual reproduction in plants

In a homozygous plant self-pollination

self pollination asexual and sexual reproduction in plants botany

  1. Is never possible

  2. Yields progeny which are highly gentically variable

  3. Yields progeny which are not genetically variable

  4. Is generally overcome by various adaptations

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Correct Option: C
Explanation:

self-pollination causes an increase in homozygosity in progeny in every generation of selfing up to approximately 96% in the F5, and selfing of homozygous line produce genetically similar progeny with negligible or little variability. So, the correct option is C. ( Yields progeny which are not genetically variable )

Maturation of anthers and stigma at the same time is?

self pollination asexual and sexual reproduction in plants botany

  1. Allogamy

  2. Xenogamy

  3. Homogamy

  4. Dichogamy

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Correct Option: C

A tobacco plant which is heterozygous for albinism (a recessive character) is self pollinated if 1200 seeds are subsequently germinated, how many of the seedlings would have the parental genotype

self pollination asexual and sexual reproduction in plants botany

  1. 300

  2. 600

  3. 900

  4. 1200

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Correct Option: B
Explanation:

XX X Xx ...      Parents

I

XX Xx Xx xx ...     Fl hybrid

In Fl generation half of the total offsprings represent 
parental genotype i.e., Xx. Therefore out of 1200 seedling 600 will have parental genotype.

In cleistogamous flowers

self pollination asexual and sexual reproduction in plants botany

  1. Both geitonogamy and xenogamy are not possible

  2. Only xenogamy is not possible

  3. Only geitonogamy is not possible

  4. Both geitonogamy and xenogamy are possible

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Correct Option: A
Explanation:

Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. Since geitonogamy is the fertilization of a flower by pollen from another flower on the same (or a genetically identical) plant and geitonogamy is the fertilization of a flower by pollen from a flower on a genetically different plant and it is known that a cleistogamous flower is unable to pollinate via any of these methods. So, the correct option is "A" (Both geitonogamy and xenogamy are not possible).

Repeated self pollination over the generations produces.

self pollination asexual and sexual reproduction in plants botany

  1. New varieties

  2. Elimination of weak traits

  3. Better progeny

  4. Weak progeny

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Correct Option: D

Effect of pollen on character of pericarp and seed coat is?

self pollination asexual and sexual reproduction in plants botany

  1. Xenia

  2. Metaxenia

  3. Ruminate endosperm

  4. Chimera

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Correct Option: B

Which of the following statement is correct?

self pollination asexual and sexual reproduction in plants botany

  1. Chasmogamous flowers always exhibit geitonogamy

  2. Cleistogamous flowers always exhibit autogamy

  3. Chasmogamous flowers never exhibit autogamy

  4. Cleistogamous flowers exhibit both autogamy and geitonogamy

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Correct Option: B

In sunflower, self pollination is avoided by _________.

self pollination asexual and sexual reproduction in plants botany

  1. Protogyny

  2. Unisexuality

  3. Self sterility

  4. Protandry

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Correct Option: D
Explanation:

A state in androgynous frameworks that is described by the improvement of male organs or development of their items previously the presence of the relating female item hence restraining self-treatment and that is experienced generally in mints, vegetables, and composites.
So, the correct option is 'Protandry'.

In which one of the following plant species can self-pollination never occur either naturally or artificially?

self pollination asexual and sexual reproduction in plants botany

  1. Zen mays

  2. Gossypium hirsutum

  3. Saccharum officinarum

  4. Carica papaya

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Correct Option: A

Match the entries in Column 1 with those of column 2 and choose the correct answer:

         Column 1(Name of pollination)         Column 2(Type of pollination)
(a) Cleistogamy (m) Insect pollination
(b) Geitonogamy (n) Bud pollination
(c) Entomophily (o) Pollination between flowers in the same plant
(d) Xenogamy (p) Wind pollination
(q) Cross pollination
self pollination asexual and sexual reproduction in plants botany

  1. a-o;b-m;c-q;d-n

  2. a-m;b-q;c-n;d-o

  3. a-n;b-o;c-m;d-q

  4. a-q;b-p;c-o;d-n

Show answer
Correct Option: C
Explanation:

Cleistogamy is the type of automatic self-pollination of certain plants. This is a form that is used to propagate plants by using self-pollinating flowers in bud state. This is also known as bud pollination.

•           Geitonogamy is the process for which the fertilization of a flower by pollen from another flower on the same plant.

•           Entomophily is the process in which pollinations are carried out by insects.

•           Xenogamy is the process of transfer of pollen grains to the stigma of a different plant. This process is cross-pollination.

Thus, the correct answer is option C.