In a typical monohybrid, a cross with respect to a certain trait, 120 plants are obtained in the F₂ generation. What will be the approximate number of homozygous and heterozygous plants respectively?

Step-by-step solution

In a typical monohybrid cross, the F₂ generation genotypic ratio is 1 : 2 : 1 for homozygous dominant, heterozygous, and homozygous recessive respectively. The proportion of homozygous plants (both dominant and recessive) is 1 + 1 4 = 1 2 . The proportion of heterozygous plants is 2 4 = 1 2 . Given the total number of plants in the F₂ generation is 120 . Number of homozygous plants = 1 2 120 = 60 . Number of heterozygous plants = 1 2 120 = 60 . Answer: 60 and 60.