Triple Fusion

Q.

What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Q. If a male angiosperm plant is diploid and its female plant tetraploid, the ploidy level of endosperm will be

1. tetraploid
2. pentaploid
3. haploid
4. triploid

Q. What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?

1. 16
2. 24
3. 32
4. 8

Q. Which of the following statement is incorrect with respect to haplontic life cycle?

1. Sporophytic generation is represented only by one-celled zygote
2. There is no free-living sporophyte
3. Mitosis in the zygote results in the formation of haploid spores
4. The haploid spores divide mitotically and form the gametophyte

Q. What would be the ploidy of the endosperm of a seed resulting from a diploid female plant and a tetraploid male plant?

1. diploid
2. triploid
3. tetraploid
4. pentaploid

Q.

What do you mean by triple fusion?

Q.

Vegetative fertilisation is also called

1. Syngamy

2. Generative fertilisation

3. True fertilisation

4. Triple fusion

Q.

Is genetic code a triplet?

Q.

If the pollen cell contain 18 chromosomes, then number of chromosomes in the enderpesm will be

1. 72

2. 54

3. 18

4. 36

Q. Triple fusion in angiosperm is the fusion of second sperm with

1. antipodal cell and one synergid cell
2. two antipodal cells
3. two synergid cells
4. two polar nuclei

Q.

What is double fertilization?

Q. Assertion (A): In angiosperms, endosperm is always triploid.
Reason (R): Endosperm results from syngamy.

1. A is true, R is false
2. Both A & R are true
3. A is false, R is true
4. Both A & R are false

Q. Polar nuclei become a part of __________ after fertilisation in angiosperms.

1. zygote
2. primary endosperm nucleus
3. Both a and b
4. None of the above

Q.

Out of 64 codons, the number of codons with GGG is

1. 6

2. 1

3. 2

4. 4

Q. In angiosperms, syngamy or true fertilization refers to what?

Q. Triple fusion results in the formation of

1. three cells
2. three haploid nuclei
3. triploid cell
4. three diploid cells

Q. Which of the following options describes perisperm?

1. Formed as a result of triple fusion
2. Formed as a result of syngamy
3. Residual nucellus
4. None of the above

Q. PEN is formed as a result of the fusion of___________ in flowering plants.

1. two polar nuclei and two male gametes
2. two male gametes and an ovum
3. a male gamete and two polar nuclei
4. a polar nuclei and a male gamete

Q. In Capsella, the endosperm is formed:

1. At the time of fertilization
2. Before fertilization
3. After fertilization
4. Before pollination

Q.

The process of the leading to the fusion of gametes in plants and animals is called

1. growth

2. fertilisation

3. development

4. fusion

Q. What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids

1. 8
2. 16
3. 24
4. 32

Q. Assertion :Mainly two polar bodies are released during each oogenesis in human Reason: One primary oocyte form two ova.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Can we say the fusion of male and female gametes in ANIMALS is syngamy?

Q. Which of the following is not a pre-fertilisation event in flowering plants?

1. Formation of Secondary nucleus
2. Porogamy
3. Formation of megaspore dyad
4. Divisions of PEN

Q. Which among the following is not a haploid structure in angiosperms?

1. Antipodals
2. Endosperm
3. Egg
4. Synergid

Q. Polar nuclei become a part of __________ after fertilisation in angiosperms.

1. zygote
2. primary endosperm nucleus
3. Both a and b
4. None of the above

Q. Food is stored in albuminous seed in

1. Testa
2. Endosperm
3. Cotyledon
4. Plumule

Q. Number of codons in the genetic triplet code is

1. 4
2. 32
3. 64
4. 16

Q. Triple fusion in angiosperm is the fusion of second sperm with

1. antipodal cell and one synergid cell
2. two antipodal cells
3. two synergid cells
4. two polar nuclei

Q. In dihybrid cross, why doesn't the phenotypic ratio be 3:1 like monohybrid cross. Why is it 9:3:3:1 or (3:1)²?