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प्रश्न
A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny?
उत्तर
•We know that violet colour of the flowers is a dominant trait and the white colour of the flowers is recessive.
•When pea plant bearing white flowers is bred with a pea plant bearing white flowers the resulted F1 progeny would consist of all violet flowers.
•The result can be explained by looking at the following figure:
•The dominant violet flower is represented by VV where as the recessive white flower his represented by vv.
•On cross breeding, the two plants we get plants having the characters Vv, Vv, Vv and Vv. Since V (i.e. violet colour) is dominant all flowers are violet.
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संबंधित प्रश्न
What is a gene?
A cross was made between pure breeding pea plants one with round and green seeds and the other with wrinkled and yellow seeds.
(a) Write the phenotype of F1 progeny. Give reason for your answer.
(b) Write the different types of F2 progeny obtained along with their ration when F1 progeny was selfed.
Mendel crossed tall pea plants with dwarf pea plants in his experiment. Write his observations giving reason on the F1 and F2 generations.
What is the genotype of tall plants which always produced tall offspring
What is the genotype of (i) dwarf plants, and (ii) tall plants, whose parental cross always produces tall offspring?
Gregor Mendel's first law of genetics states "Of a pair of contrasted characters, only one can be represented in a gamete by its internal 'factor' State where these factors are found in gametes.
In order to ensure that he had pure-breeding plants for his experiments, Mendel :
(a) cross-fertilised each variety with each other
(b) let each variety self fertilise for several generations
(c) removed the female parts of the plants
(d) removed the male parts of the plants.
In the human blood grouping, the four basic blood types are type A, type B, type AB, and type O. The blood proteins A and B are :
(a) simple dominant and recessive traits
(b) incomplete dominant traits
(c) codominant traits
(d) sex-linked traits
Hereditary characters are transferred from parents to offspring by ______ hence they are said to be structural and functional units of heredity.
Rewrite the correct form of the statement by changing the first or last word only:
The inheritable feature of an organism is termed as heredity.
