Tag: parthenogenesis

Questions Related to parthenogenesis

 Parthenogenesis occurs in which of the following animal?

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Sheep

  2. Sponges

  3. Ant

  4. Hydra

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Correct Option: C
Explanation:

Parthenogenesis is a form of asexual reproduction where an egg develops into an offspring without being fertilized. Many insects like aphid, ant, bee, parasitic wasp reproduce parthenogenetically. 

Which is example of parthenocarpic fruit?

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Strawberry

  2. Cashew

  3. Banana

  4. Apple

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Correct Option: C
Explanation:

Parthenocarpic fruits are the fruits that develop without fertilisation. It is a phenomenon of formation of fruit from unfertilized flower. These fruits are seedless. Example , Banana.

So, the correct answer is C.

In honey bees, males (drones) are formed from

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Unfertilized eggs

  2. Fertilized eggs

  3. Embryo

  4. None of the above

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Correct Option: A
Explanation:
The male honey bees are called drones. Drones are formed from the unfertilized eggs i.e. haploid eggs of the queen bee. Fertilized eggs form queens and female workers. Drones are meant for mating with the queen bee and soon die after mating.
So, the correct answer is 'Unfertilised eggs'.

Offsets are produced by?

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Parthenocarpy

  2. Mitotic divisions

  3. Meiotic divisions

  4. Parthenogenesis

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Correct Option: A

In which of the following plants, it is undesirable to obtain seedless fruits?

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Tomato

  2. Orange

  3. Watermelon

  4. Pomegranate

Show answer
Correct Option: D
Explanation:

Parthenocarpy is the phenomenon behind most seedless fruits.  Parthenocarpy is fruiting without the union of a male and a female egg cell.  The lack of fertilization means that there are no seeds in the fruit.  If there are seeds, they are not viable and are not capable of germinating. Parthenocarpy is not found beneficial in only one type of fruits, that is pomegranate. It is because seeds are the edible parts in this fruit.

Process of formation of an individual without contribution of father is called as

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Epigenesis

  2. Pangenesis

  3. Induction

  4. Parthenogenesis

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Correct Option: D
Explanation:

The process of sexual reproduction usually involves gametogenesis, which generates haploid gametes (sperm and ovum) and their fusion during fertilization. Sometimes an embryo can develop without participation of male gamete (sperm). Parthenogenesis is a type of asexual reproduction in which females produce offspring from unfertilized eggs i.e., the development of an unfertilized egg into an adult organism. It is common among honeybees, wasps, and certain other arthropods.

Natural parthenogenesis occurs in

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Dog

  2. Honey-bee

  3. Frog

  4. House-fly

Show answer
Correct Option: B
Explanation:

Parthenogenesis is a type of asexual reproduction in which an unfertilized egg develops into an adult animal. The adult is typically haploid. Parthenogenesis is common among insects (especially honeybees and wasps) and crustaceans; it also occurs among some other invertebrate and vertebrate groups, including some species of nematodes, gastropods, fishes, amphibians, and reptiles. Thus, the correct answer is option B.

Eggs of which one of these can develop parthenogenetically by chemicals?

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Man

  2. Frog

  3. Sea urchin

  4. All of the above

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Correct Option: C
Explanation:

Artificial parthenogenesis can be induced in eggs of both frog and sea urchin but chemical (hypertonic sea water) induction occurs in sea urchin, whereas, frog eggs when pricked with a needle can undergo parthenogenesis. Thus, the correct answer is option C.

Read the following statements $1$ and $2$ and identify the correct one.
$(1)$ In bees parthenogenetic zygote develops into monoploid male
$(2)$ The fertilised egg develops into diploid female.

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. $1$ is correct, $2$ is not correct

  2. Only $2$ is correct

  3. Both $1$ and $2$ are incorrect

  4. Both $1$ and $2$ are correct

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Correct Option: A

Parthenocarpy is the production of 

zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

  1. Fruits with pollination

  2. Fruits without fertilization

  3. Seeds with fertilization

  4. Only seeds and no fruits

Show answer
Correct Option: B
Explanation:

In angiosperms, fruits represent ripened ovary of the flower. Fruit formation starts after fertilisation. However, sometimes fruit formation can be carried out without fertilization. Such, fruits are called as parthenocarpic fruits. They are seedless and lack embryo because no fertilization has occurred. Phytohormone auxins promote parthenocarpy. They have been used to induce parthenocarpy in tomatoes.

Thus, the correct answer is option B.