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प्रश्न
What is the genotype of dwarf plants whose parental cross always produces tall offspring?
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उत्तर
A tt (dwarf) plant crossed with a TT (homozygous tall) plant produces all Tt offspring. Since T is dominant over t, all the offspring are tall.
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संबंधित प्रश्न
Mendel crossed tall pea plants with dwarf pea plants in his experiment. Write his observations giving reason on the F1 and F2 generations.
How is the equal genetic contribution of male and female parents ensured in the progeny?
Fill in the following blank with suitable word .
In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
It it an example of monohybrid cross or dihybrid cross?
In the F2 generation of a cross, progeny having different traits are produced in the ratio 3 : 1. State whether it is a monohybrid cross or a dihybrid cross? Give one example of such a cross.
What is the genotype of dwarf plants which always produced dwarf offspring?
What is the genotype of tall plants which always produced tall offspring
Why did Mendel choose pea plants for conducting his experiments on inheritance?
How do Mendel's experiments show that traits may be dominant or recessive?
A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants because :
(a) tallness is the dominant trait
(b) shortness is the dominant trait
(c) tallness is the recessive trait
(d) height of plant is not governed by gene T or t
In humans, if gene B gives brown eyes and gene b gives blue eyes. What will be the colour of eyes of the persons having the following combination of genes?
(a) Bb
(b) bb
(c) BB
Only one of the following characteristic of the parents can be inherited by their children. This one is:
The farmers have been cultivating a food plant X for over two thousand years and have produced as many as five entirely different looking vegetables A, B, C, D and E from it.
(a) What could the plant X be?
(b) What are A, B, C, D and E?
(c) What is the process of evolution involved in this example known as?
Explain the mechanism of hereditary changes.
Define Heredity. Give two examples.
Who is the pioneer of modern genetics?
What will be the number of chromosomes present in each gamete produced by the plants if the palisade cells of a species of the plant contain 28 chromosomes in all?
Mendel crossed pea plants with two pairs of contrasting characters.
| RRYY | × |
rryy |
| Round, Yellow | Wrinkled, Green |
He observed 4 types of combinations in F2 generation. Which of the combinations were new? Write the conclusion drawn by this experiment.
Name the following:
The basic units of heredity.
