6) Explain Mendel's monohybrid progeny with the help of Tall pea plant and Dwarf pea plant.
Answers
Answer:
Monohybrid cross is a cross between two parents that have one pair of contrasting characters; for example, if pea plant with yellow seed coat is crossed with pea plant having green seed coat then in the F1 generation all the plants produce yellow seeds.
Monohybrid cross is a cross between two parents that have one pair of contrasting characters; for example, if pea plant with yellow seed coat is crossed with pea plant having green seed coat then in the F1 generation all the plants produce yellow seeds. When the plants of the F1 are selfed the progeny or the F2 generation produces Yellow seed coat and green seed coat in the ratio of 3:1 respectively.
Answer:
Monohybrid cross is a cross between two parents that have one pair of contrasting characters; for example, if pea plant with yellow seed coat is crossed with pea plant having green seed coat then in the F
1
generation all the plants produce yellow seeds.
When the plants of the F
1
are selfed the progeny or the F
2
generation produces Yellow seed coat and green seed coat in the ratio of 3:1 respectively.
Explanation:
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