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Question
How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly.
Solution
Mendel interpreted his results by observing the first and second filial generations. He observed that even when not expressed in the first filial generation, alternate forms of a trait could retain their identity in the hybrid and could re-emerge in the next generation. He concluded that each factor contained information about a form of a trait.The factor associated with the trait that was expressed in the hybrid offspring was dominant and the factor associated with the trait that remained hidden in the hybrid but reappeared in the next generation was recessive.
RELATED QUESTIONS
How do Mendel's experiment show that traits are inherited independently?
To perform an experiment to identify the different parts of an embryo of a dicot seed, first of all you require a dicot seed. Select dicot seeds from the following group:
Wheat, Gram, Maize, Pea, Barley, Ground-nut
(A) Wheat, Gram and Pea
(B) Gram, Pea and Ground-nut
(C) Maize, Pea and Barley
(D) Gram, Maize and Ground-nut
It it an example of monohybrid cross or dihybrid cross?
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive :
Round seed
When two parents are crossed, the offspring are referred to as :
recessives
test cross
F1 generation
F2 generation
A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants because :
(a) tallness is the dominant trait
(b) shortness is the dominant trait
(c) tallness is the recessive trait
(d) height of plant is not governed by gene T or t
Which of the following statement is incorrect?
(a) for every hormone there is a gene
(b) for every protein there is a gene
(c) for production of every enzyme there is a gene
(d) for every type of fat there is a gene
One of the following traits cannot be inherited. This one is :
(a) colour of eyes
(b) colour of skin
(c) size of body
(d) nature of hair
Answer the following question.
Why are the traits acquired during the life-time-of-an individual not inherited? Explain.
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?
