How do Mendel' s experiments show …

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How do Mendel' s experiments show that traits may be dominant or recessive

Posted by Ishika Kumari 5 years ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years ago

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

(Mendel’s first law of inheritance states that when a pair of contrasting factors is brought in a hybrid, one factor inhibits the appearance of the other. The one which inhibits is the dominant one and which is inhibited is recessive.)

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Lomror ? 5 years ago

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 F1 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.

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CBSE > Class 10 > Science