Question

What physical basis explains the mechanism of the law of segregation?

विकल्प

• Meiosis I, where homologous chromosomes carrying different alleles are pulled to opposite poles

• Mitosis II, where sister chromatids separate randomly

• DNA replication, where alleles duplicate themselves

• Interphase, where alleles exchange genetic information

Answer 1

The law of segregation is physically explained by Meiosis I. During Anaphase I, homologous chromosomes—each carrying different alleles of the same gene—are pulled to opposite poles of the cell. This separation ensures that each resulting haploid gamete receives only one allele. For example, in a Tt parent, the chromosome with T separates from the chromosome with t, resulting in gametes that are pure for either T or t.