Biology

Biological Reproduction

806 Questions

Biological reproduction encompasses processes like asexual and sexual reproduction, alternation of generations, and specific mechanisms in plants and fungi. This topic is fundamental for biology paper preparation in various competitive exams. Practice these questions to solidify your understanding.

Asexual reproduction structuresPlant and fungi life cyclesCloning and fertilizationReproductive terminology

Biological Reproduction Questions

Multiple choice

Paratomy is a form of

  1. sexual reproduction

  2. asexual reproduction

  3. vegetative reproduction

  4. behavior in which an animal sheds or discards one or more of its own appendages
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Paratomy is a form of asexual reproduction in animals where the organism splits in a plane perpendicular to the antero-posterior axis and the split is preceded by the pregeneration of the anterior structures in the posterior portion.

Multiple choice

Homokaryons are produced in

  1. induced fusion

  2. nucellus culture

  3. spontaneous fusion

  4. cell suspension technique
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homokaryons are produced by fusion of protoplasts lying in proximity.

Multiple choice

In a cross between a white-eyed female dragonfly and red-eyed male, how many female progenies will inherit white eyes?(White eyes are X-linked recessive)

  1. 0%

  2. 25%

  3. 50%

  4. 75%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All the female eggs will have X chromosome with the white-eye mutation while the sperm will posses either a normal X chromosome or a Y chromosome. By using Punnett square, we can predict the outcome of this cross. Female progenies will receive X chromosome from both the sperm and egg cells. All females receive the dominant, red-eyed allele from their fathers and the recessive, white-eyed allele from their mothers.

Multiple choice

A white-eyed female fruitfly is crossed with a red-eyed male fruitfly. Red eyes are dominant, and X-linked. What are the expected phenotypes of their children?

  1. 100% females will have red eyes while 50 % males will have red eyes, and 50% males will have white eyes.

  2. 100% females and 100% males will have white eyes.

  3. 100% females will have red eyes & 100% males will have white eyes.

  4. 100% females and 100% males will have red eyes.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As per the question, all of the females are red-eyed and heterozygous. All of the males are white-eyed and hemizygous.

Multiple choice

What is the advantage offered by the haploid state to the fungal life cycle?

  1. Quick reproduction

  2. More genetically diverse

  3. Large number of cell production

  4. Energy conservation for life sustenance

  5. Spread of the infective stage to healthy host
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Haploid spores can form and spread faster and more efficiently than diploid zygotes because they do not undergo meiosis.

Multiple choice

Which of the following is not a characteristic of sexual reproduction?

  1. It involves the formation of gametes

  2. It leads to variations in the offspring

  3. It produces identical copies of parents

  4. It promotes diversity of characteristics in the offspring
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sexual reproduction involves gamete formation (A), leads to genetic variations (B), and promotes diversity (D) - all true. However, it does NOT produce identical copies - that's asexual reproduction. Offspring inherit unique combinations of traits from both parents.

Multiple choice

Individuals having both male and female sex organs are called

  1. asexual

  2. bisexual

  3. unisexual

  4. multi - sexual
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bisexual organisms (or hermaphrodites) possess both male and female reproductive organs either simultaneously or sequentially. Asexual reproduction involves one parent, unisexual organisms have separate sexes, and 'multi-sexual' is not a valid biological term.