Tag: self pollination

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Questions Related to self pollination

Multiple choice self pollination asexual and sexual reproduction in plants botany

In a homozygous plant self-pollination

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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 )

Multiple choice self pollination asexual and sexual reproduction in plants botany

Maturation of anthers and stigma at the same time is?

  1. Allogamy

  2. Xenogamy

  3. Homogamy

  4. Dichogamy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homogamy is the condition in flowers where the anthers (male) and stigma (female) mature at the same time, which facilitates self-pollination.

Multiple choice self pollination asexual and sexual reproduction in plants botany

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

  1. 300

  2. 600

  3. 900

  4. 1200
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice self pollination asexual and sexual reproduction in plants botany

In cleistogamous flowers

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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).

Multiple choice self pollination asexual and sexual reproduction in plants botany

Repeated self pollination over the generations produces.

  1. New varieties

  2. Elimination of weak traits

  3. Better progeny

  4. Weak progeny
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Repeated self-pollination leads to inbreeding depression, where the accumulation of homozygous recessive deleterious alleles results in reduced fitness and vigor. This process is commonly used in breeding to create pure lines, but it often manifests as weak progeny.

Multiple choice self pollination asexual and sexual reproduction in plants botany

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

  1. Xenia

  2. Metaxenia

  3. Ruminate endosperm

  4. Chimera
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metaxenia refers to the effect of pollen on maternal tissues like the pericarp and seed coat, which are outside the embryo and endosperm. Xenia refers to the effect of pollen on the endosperm itself.

Multiple choice self pollination asexual and sexual reproduction in plants botany

Which of the following statement is correct?

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cleistogamous flowers remain closed throughout their development, which physically forces the pollen to land on the stigma of the same flower, ensuring autogamy. Chasmogamous flowers are open and can facilitate either self or cross-pollination.

Multiple choice self pollination asexual and sexual reproduction in plants botany

In sunflower, self pollination is avoided by _________.

  1. Protogyny

  2. Unisexuality

  3. Self sterility

  4. Protandry
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

Multiple choice self pollination asexual and sexual reproduction in plants botany

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.