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प्रश्न
The F2 progeny of a monohybrid cross showed phenotypic and genotypic ratio as 1:2:1 unlike that the Mendel’s monohybrid F2 ratio. With the help of a suitable example, work out a cross and explain how it is possible.
उत्तर
Monohybrid cross is a cross where two forms of a single trait are hybridised. Mendel crossed a pure tall pea plant with a pure dwarf pea plant and obtained all tall plants in the first filial generation. The character which appeared in the F1 generation is called the dominant character, whereas the character which is not expressed in the F1 generation is called the recessive character. After intercrossing the hybrids of the F1 generation, he obtained the tall and the dwarf progeny in the ratio 3:1 (phenotypic ratio), but the genetic ratio was 1:2:1 which is TT, Tt and tt.
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संबंधित प्रश्न
Describe quantitative inheritance controlled by two pairs of genes.
Define the following:
Dominant
The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were ______.
What is the probability of production of dwarf offsprings in a cross between two heterozygous tall pea plants?
If linkage was known at the time of Mendel then which of the following laws, he would not have been able to explain?
Give the basic features of the mechanism of inheritance.
How many pairs of contrasting characters in pea bad were chosen by Mendel?
Tall pea plants having green pods were crossed with dwarf pea plants having yellow pods. Out of 80 plants, how many are likely to be tall plants in the F2 generation?
Enumerate the cause and the characteristic symptom of PKU.
