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Explain the law of dominance using …

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Explain the law of dominance using a monohybrid cross

Posted by K@Łp@N@ $Øđh!?? 6 years, 5 months ago

CBSE > Class 12 > Biology

1 answers

Sia ? 6 years, 5 months ago

This law gives the explanation for expression of only one of the parental trait in F₁ hybrid.
This law states that out of a pair of contrasting characters only one is able to express itself phenotypically in F₁ hybrid called as dominant while the alternate form remains hidden and called recessive.
In a cross between true breeding tall pea plant and a true breeding dwarf pea plant, all the plants of F₁ generation were tall.
When the F₁ individuals were self-pollinated it was observed that the tall and dwarf plants in F₁ generation were in the ratio of 3 : 1.
further, when dwarf plants were self-pollinated, the successive generation produced only dwarf plants showing their homozygous/true breeding nature.
On self-pollination of tall plants, some of them produced only tall plants in successive generations while others produced both tall and dwarf plants showing their Heterozygous nature.

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