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प्रश्न
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:
Yellow seed
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उत्तर
Green seed. Yellow seed is the dominant trait and green seed is the recessive trait.
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संबंधित प्रश्न
How do Mendel's experiment show that traits are inherited independently?
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.
Name the information source for making proteins in the cells.
State whether the following statement is true or false :
The sex of an infant is not a case of inheritance of characteristics.
Using height (tallness/dwarfness) of a plant as an example, show that genes control the characteristics or traits in an organism.
It it an example of monohybrid cross or dihybrid 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
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 Give the modern name for this 'factor'.
How do Mendel's experiments show that traits are inherited independently?
The visible characteristic in an organism is known as ______.
Select the statements that describe characteristics of genes :
(i) genes are specific sequences of bases in a DNA molecule.
(ii) a gene does not code for proteins.
(iii) in individuals of a given species, a specific gene is located on a particular chromosome.
(iv) each chromosome has only one gene..
Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in F1generation are then cross-bred to produce F2 generation of pea plants.
(a) What do the plants of F1 generation look like?
(b) What is the ratio of tall plants to dwarf plants in F2 generation?
(c) Which type of plants were missing in F1 generation but reappeared in F2 generation?
"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.
Write the advantages of heredity.
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 combinations
(i) Bb and (ii) BB?
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?
Assertion: When pure breed tall plants are crossed with pure breed short plants, all the plants in F1 progeny are tall. When the tall plants of F1 progeny are crossed, short plants re-appear in F2 progeny.
Reason: Traits are independently inherited.
If a tall pea plant is crossed with a pure dwarf pea plant then, what percentage of F1 and F2 generation respectively will be tall?
