Question

Hey guys
How do Mendel’s experiments show that traits may be dominant or recessive ?​

Answer 1

Answer:

Mendel's experiments show that the Traits may be dominant or recessive by performing a monohybrid cross. Monohybrid cross between two pure breeding varieties always obtained hybrid progeny exhibiting one parental trait while the opposite trait was never expressed in the F1 generation.

Solution

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Mendel conducted the experiments using Pisum sativum or pea plant.

He selected homozygous tall (TT) and dwarf (tt) pea plants.

He crossed the tall pea plant with the dwarf pea plant.

It was observed that the F

1

generation are all tall plants.

Thus, it was concluded that the gene causing tallness is dominant while the gene causing dwarfness is recessive.

The trait expressing itself in the hybrid is the dominant one.

This experiment proves Mendel’s first law of inheritance.

It states that when a pair of contrasting factors is brought in a hybrid, one factor inhibits the appearance of the other, one which inhibits is the dominant one and which is inhibited is recessive.

Answer 2

Answer:

Mendel selected true breeding tall (TT) and dwarf (tt) pea plants. When a tall pea plants is crossed with a short (dwarf ) pea plant, all the F1 hybrids are tall (I. e in case the gene causing dwarfness is a recessive). The traits expressing itself in the hybrid is dominant one.

Mendel first law of inheritance states that when a pair of contrasting factors in a hybrid , one factor inhibits the dominant one and which is inhibited is recessive.