Question

In a heterozygous parent (Tt), what percentage of gametes will carry the T allele and what percentage will carry the t allele?

Options

• 100% T and 0% t

• 66% T and 34% t

• 50% T and 50% t

• 75% T and 25% t

Answer 1

During meiosis in a heterozygous parent (Tt), the alleles segregate equally during Meiosis I. The homologous chromosomes carrying T and t are pulled to opposite poles, resulting in two types of gametes produced in equal proportions: 50% carrying the T allele and 50% carrying the t allele. This 1:1 ratio ensures random assortment of alleles to the next generation.