Advertisements
Advertisements
Question
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
Solution
tallness is the dominant trait
In progeny, all plants obtained will be tall because tallness is the dominant trait, while dwarfism is the recessive trait.
APPEARS IN
RELATED QUESTIONS
How do Mendel's experiment show that traits are inherited independently?
In one of his experiments with pea plants, Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant in the first generation, F1, only tall plants appear.
(a) What happens to the traits of the dwarf plants in this case?
(b) When the F1-generation plants were self-fertilised, he observed that in the plants of the second generation, F2, both tall plants and dwarf plants were present. Why it happened? Explain briefly.
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
Why did Mendel choose pea plants for conducting his experiments on inheritance?
When two parents are crossed, the offspring are referred to as :
recessives
test cross
F1 generation
F2 generation
In order to ensure that he had pure-breeding plants for his experiments, Mendel :
(a) cross-fertilised each variety with each other
(b) let each variety self fertilise for several generations
(c) removed the female parts of the plants
(d) removed the male parts of the plants.
The farmers have been cultivating a food plant X for over two thousand years and have produced as many as five entirely different looking vegetables A, B, C, D and E from it.
(a) What could the plant X be?
(b) What are A, B, C, D and E?
(c) What is the process of evolution involved in this example known as?
Hereditary characters are transferred from parents to offspring by ______ hence they are said to be structural and functional units of heredity.
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because