a) why the f1 progeny is all tall when a tall pea plant and a small pea plant is crossed??
b) how is the f2 progeny different from f1 progeny??
c) what conclusion can be drawn on this basis??
Answers
Answer:
The progeny is tall or short due to the following mechanism of the
Tall. Short
Tall TT Tt
Short. tT tt
In the f1 progeny has one TT plant in which the tallness trait is dominant and hence it is tall
In second tt is dominant and hence shortness trait is dominant and hence the plant is small.
Note:TT, Tt, tT will give tall plants since the tallness trait is dominant
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Answer:
a. Tt (1 mark)
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. (1mark)
c. Out of 800 plants 600 plants will be tall and 200 plants will be small (1 mark), 1
TT: 2Tt: 1tt (1 mark)
Explanation: