Question

is it possible that trait is in herited but may not be expressed give an suitable example to justify this statement​

Answer 1

Answer:

Yes it is possible that a trait which is inherited may not be expressed. In mendle's experiment with the pea plants he proved this by crossing a tall pea plant with a short pea plant. In his experiment he observed that all the plants in the F1 generation are tall (Tt) ... Though he thought of a mixed combination. He then self bred the plants of F1 generation and saw that not all plants were tall, 3 out of 4 plants were tall (Tt) while 1 was short (tt) . This shows that a trait may not be expressed in a generation but it is inherited. This is due to the fact that tallness is the dominant trait while shortness is a recessive trait. In the absence of the dominant trait, recessive trait is expressed,

Explanation:

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Answer 2

Answer:

For 3 Marker:

⇒ Yes, it is possible that a trait is inherited but may not be expressed.

For example, when pure tall pea plants are crossed with pure dwarf pea plants, only tall pea plants are obtained in F! generation.

On selfing tall plants of F1; both tall and dwarf plants are obtained in F2 generation in the ratio 3:1. Reappearance of the dwarf character, a recessive trait in F2 generation shows that the dwarf trait was present in individuals of F1 but it did not express.

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For 5 Marker:                                    

⇒ Each trait is influenced by both paternal and maternal DNA. For each trait, there are two versions in the offspring. These two traits may be different or may be identical, depending upon the parentage. Thus, some traits may be inherited but not expressed. The hidden trait is called recessive and the expressed trait is called dominant.

For example: When Mendel crossed the tall pea plants of F1 generation, he found that tall and dwarf plants were obtained in F2�generation. He noted that the dwarf trait of the parent pea plant that disappeared in the F1 generation progeny re-appeared in F2�generation.�Mendel concluded that the dwarfness traits of parent pea plant were not lost.� They were suppressed in the F1�generation to re-appear in the F2�generation. In this way, Mendel called expressed traits of tallness as dominant or suppressed traits of dwarfness as recessive.

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