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प्रश्न
A male plant bearing red flowers was crossed with a female plant bearing yellow flowers. In the F1 generation, all the flowers were orange in colour.
Mention the ratio of red flowers, yellow flowers and orange flowers in the F2 generation.
उत्तर
When heterozygous orange flowers from the F1 generation interbreed, the F2 generation displayed pure parental features. Instead of the conventional 3:1, the Mendelian ratio becomes
| R | y | |
| R | RR Red |
Ry Orenge |
| y | Ry Orenge |
yy yellow |
1 (Red flower) : 2 (Orange flower) : 1 (Yellow flower)
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संबंधित प्रश्न
Using a Punnett square, work out the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.
Describe quantitative inheritance controlled by two pairs of genes.
Predict the genotype and phenotype of the following cross in pea.
TtRr x TtRr
(Capital letters show dominance)
Choose the correct answer:
A cross where two pairs of alleles are considered is a ____________
Genes which code for a pair of contrasting traits are known as ______.
When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both its parents. This phenomenon is called?
The genotype of a plant showing the dominant phenotype can be determined by ______.
A green stemmed tomato plant denoted by (GG) is crossed with a tomato plant with purple stem denoted by (gg).
- What colour of the stem would you expect in their F1 progeny?
- In what ratio would you find the green and purple coloured stem in plants of F2 progeny?
- What conclusion can be drawn for the above observations?
What is the scientific name of the pea plant that Mendel used for his experiments?
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?
