Identify the correct statement from the ones given below based on the way Mendel conducted his experiments.

Question

Question

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RRB Group D 29 Aug 2022 Shift 3 Official Paper

Self-fertilisation of plants was performed initially, followed by cross-fertilisation.
Cross-fertilisation of plants was performed initially, followed by self-fertilisation.
Only self-fertilisation was performed.
Only cross-fertilisation was performed.

Answer 1

The correct answer is 'Cross-fertilisation of plants was performed initially, followed by self-fertilisation'.

Key Points

Monohybrid Cross: A cross between two types of plants of the same species considering only the transmission of one character is called a monohybrid cross.
Explanation:
Gregor Johann Mendel used the monohybrid cross to determine the dominant and recessive traits in the case of peas.
He first crossed true-breeding tall pea plants with true-breeding dwarf pea plants.
The homozygous allele for the tall pea plant is represented by TT, and the homozygous allele for the short/dwarf pea plant is represented by tt.
A monohybrid cross between the two plants results in the production of a heterozygous genotype (Tt).
In terms of phenotype, the F1 generation has all tall pea plants, thus indicating that the tall trait is the dominant trait and the short trait is a recessive trait.
The F1 generation is then self-fertilized to get F2 generation.
In F2 generation tall and dwarf plants can be seen in a ratio 3:1.

F3 Madhuri Engineering 25.04.2022 D10

Phenotype: It refers to the external appearance.
Genotype: It refers to the genetic constitution i.e., the types of genes present in the organism.