Which law of mendel holds good even in this modern period of cytogenetics?

Options

A. Law of independent assortment
B. Law of purity of gametes
C. Law of dominance
D. al of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Mendel's Laws**: Mendel proposed several laws based on his experiments with pea plants. The main laws include the Law of Segregation, Law of Independent Assortment, and Law of Dominance.

2. **Identifying the Relevant Law**: The question asks which of Mendel's laws is still applicable in modern cytogenetics. The options provided are:
- Law of Independent Assortment
- Law of Purity of Gametes (Law of Segregation)
- Law of Dominance
- All of the above

3. **Analyzing the Law of Purity of Gametes**: The Law of Purity of Gametes, also known as the Law of Segregation, states that during the formation of gametes, the two alleles for a trait separate so that each gamete carries only one allele for each gene. This means that the genetic factors (alleles) do not blend but remain distinct.

4. **Modern Relevance**: In modern cytogenetics, this law holds true as it aligns with our understanding of meiosis, where homologous chromosomes segregate into different gametes. This ensures that gametes are pure in terms of the genetic information they carry.

5. **Conclusion**: Given the analysis, the correct answer is the Law of Purity of Gametes (Law of Segregation), which is option B.

**Final Answer**: The law of Mendel that holds good even in the modern period of cytogenetics is the Law of Purity of Gametes (Law of Segregation).

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