Question

Explain monohybrid cross with suitable example.

Answer 1

A cross between two types of plants of same species considering only the transmission of one character is called monohybrid cross. For example, a cross between tall pea plants and dwarf pea plant that is considering only the height of the parents is a monohybrid cross. It will result in the formation of tall offsprings but they will be hybrid.

Representation of the monohybrid cross: character in focus is the height

Parents- TT X tt

(Tall) (dwarf)

F${}_1$- Tt

(Heterozygous tall)

On selfing:

Tt X Tt

F${}_2$- TT Tt Tt tt

Phenotypic ratio- 3 tall: 1 dwarf

Genotypic ratio- 1 homozygous tall: 2 heterozygous tall: 1 homozygous recessive