The Question is from neet-zoology reproduction , and it was created by the author T HARITHA

Question

Which one of the following in&generates new genetic combinations leading to variation?

T HARITHA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Genetic Variation and Reproduction
 **Related Topics**: Sexual reproduction, meiosis, genetic recombination, mutation, asexual reproduction
 **Prerequisites**: Understanding of basic genetics, meiosis, and different types of reproduction.
## SOLUTION PATHWAY
**Given Information**:
The question asks which reproductive method generates new genetic combinations leading to variation.
**Method & Steps**:
1. Analyze each option:
  Reasoning: We need to consider how each reproductive method affects the genetic makeup of offspring.
  Formula/Rule: None directly applicable, but understanding of genetic processes is crucial.
2. Evaluate options:
  Working:
  * A. Nucellar polyembryony: This is a type of asexual reproduction where embryos develop from the nucellus (tissue surrounding the embryo sac) of the ovule. It results in genetically identical offspring.
  * B. Vegetative reproduction:  This is also a form of asexual reproduction involving the growth of a new plant from vegetative parts (stems, roots, leaves). Offspring are genetically identical clones.
  * C. Parthenogenesis:  Asexual reproduction where an unfertilized egg develops into a new individual. The offspring is genetically identical to the parent, except for possible mutations.
  * D. Sexual reproduction: This involves the fusion of gametes (sperm and egg) from two parents. Meiosis during gamete formation shuffles genes, leading to genetic recombination and variation in offspring. 
 3. Select the correct option:
  Result: Sexual reproduction is the only option that inherently generates new genetic combinations through meiosis and fertilization.
  Verification: The other options are forms of asexual reproduction, which produce genetically identical offspring (except for rare mutations).
 ## OPTION ANALYSIS
A :x: Nucellar polyembryony is asexual reproduction, leading to genetically identical offspring.
B :x: Vegetative reproduction is asexual, resulting in clones.
C :x: Parthenogenesis is asexual, creating genetically identical offspring (barring mutations).
D ✓: Sexual reproduction combines genetic material from two parents, generating new combinations and variation through meiosis and fertilization.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing sexual and asexual reproduction: Understanding the key difference between meiosis (sexual) and mitosis (asexual) is vital.
  2.Overlooking the role of meiosis in generating variation: Meiosis is the key process that shuffles genes and creates genetic diversity in sexual reproduction.
 **Quick Tips**:
  1.Remember that asexual reproduction creates clones, while sexual reproduction generates genetic variation.
  2.Focus on the process of meiosis and its role in generating unique gametes in sexual reproduction.

T HARITHA · Answer

Nucellar polyembryony

T HARITHA · Answer

Vegetative reproduction

T HARITHA · Answer

Parthenogenesis

T HARITHA · Answer

The correct Option is "Sexual reproduction"

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