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a. What will be set of genes present in the F1 generation?  b. Give reason why only tall plants are observed in F1 progeny. 

Monjur Alahi

Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation. 

a. What will be set of genes present in the F1 generation? 

b. Give reason why only tall plants are observed in F1 progeny. 

c. When F1 plants were self - pollinated, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F 2 generation.  

OR 

When F1 plants were cross - pollinated with plants having tt genes, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F 2 generation.


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Salim Ahmed Kawsar

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a. Tt 

b. Traits like ‘T’ are called dominant traits, while those that behave like ‘t’ are called recessive traits./Alternatively accept the definition of dominant and recessive traits with examples of T and t respectively /Alternatively accept the law of Dominance with examples of T and t. 

c. Out of 800 plants 600 plants will be tall and 200 plants will be small , 1 TT: 2Tt: 1tt 

OR 

In the cross between Tt X tt, 400 Tall (Tt) and 400 short (tt) plants will be produced.

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